Wrong!
S-300, S-400, and S-500 all beg to differ with your absurd logic.
Iran Bavar follows same formula it uses 3 DIFFERENT missiles to engage different types of targets.
So the missile that engages a BM is not the same as the missle that engages an aircraft or a cruise missile.
The S series of Russian air defense system shows operate in similar fashion, they incorporate new missile and some additional components (radar, fire and control, etc) instead of reinventing the wheel.
And considering Russia is considered world wide to have the best air defense technology I think they know more than you do.
WRONG!
Modern day RV’s can change trajectory and at the upper limits of the atmosphere (where most anti-BM’s seak interception) a simple deviation can throw the trajectory off by many KM’s!
And if you know physics you know a interceptor missile that is going supersonic to intercept the Warhead has to contend with EXTREME G-forces that could potentially tear the interceptor missile apart if it needs to deviate from its own trajectory.
LOL! You are talking about a UFO at that point. What modern aircraft can go from supersonic speeds or high speeds stop quickly and turn around? You watch too much Hollywood movies.
Lastly even saying a fighter jet can out maneuver An advanced interceptor is just funny. At such an altitude (35,000 feet) an interceptor can withstand much more G-force manuveurs to catch the fighter than a human pilot can withstand before passing out. Hence why most pilots rely on EW,jamming, afterburners rather than dog fighting a interceptor.
Two completely separate systems is expensive and wasteful spending! This is money/resources/time that Iran doesn’t have!
Iran can simply use the Bavar system and add new radar and sub systems and new type of interceptor missile and achieve the same thing (Bavar-2)! That is what Russia does with the S-300, S-350, and S-400 and now S-500 (hypersonic vehicle interceptor).
So now your claiming to know everything about a system Iran hasn't even made public yet!!!!! Yes they showed a few part and components but entire system has not been made public!
And who do you think does more testing of their systems the U.S. or the Russians???
Yes the U.S. Patriot system can also intercept crude BM so what? I can't comment on the S-500 because I just don't know much about it! For all I know they also have a totally independent tracking specialized for and specifically made for BM I DONT KNOW!
And it's not about reinventing the wheel!!!!!!! Right now the RCS of modern aircrafts are as small as birds so you need to use speed and altitude to remove clutter from real threats because there will always be a limit to the number of targets you can track and it becomes much harder with longer ranged systems
And a real life scenario is completely different than controlled tests! In real life you'll have BM's with decoys + Fighters + Cruise Missiles + UCAV's + Decoy UAV's... coming at you! And that's just too many threats with different specs (Like attitude and speed) coming at you for one radar tracking system at Iran's technological capabilities to handle!
As for modern RV as I said "UP ON RE-Entry" They can't change their trajectory or speed by all that much & yes a small change in trajectory at high altitude will make a lot of difference as to where they land but the actual trajectory does not change by all that much! so the requirements for your missiles ability to change it's speed and trajectory are completely different than a fighter that can easily turn around and can constantly change it's speed, heading, altitude & release chaff especially when fired upon from over 100km away!
And the fact that fighters can turn is nothing NEW I honesty don't know of any fighter that can't turn!! The Bavar 373 is not a short range system equipped with Scramjet engines! So a modern fighter equipped with modern sensors and a sensor fuzzed network will have ample time to detect your launch and react to it!
And no trained fighter pilot fly's straight towards an incoming SAM or A2A missile! They turn and release chaff & or flairs depending on the threat!
Bavar is meant to be a long rang system with a wide field of view and you have to be picky as to what you plan on tracking and if try to put it all into one tracking system you'll end up with something like the Patriot system which is a fine system as long there are a limited number of threats it has to face and if you try to throw too much at it, it will come up short & that's why the U.S. developed the THAAD to focus on higher altitude threats with specially designed missiles to deal with them
Now the U.S. could have networked the THAAD into the Patriot and called it the New Patriot and for all I know that's how the new S-500 works!!!!!!!!!! Names do NOT matter but the various types of Radars, Sensors, Missiles,... you have do!
And I'm telling you at Iran's technological capabilities trying to put all that responsibility on one system from what I have seen of the Bavar 373 so far is too much! And I could be wrong there could be a different fire control systems and altitude detection radar that hasn't been made public so far I DONT KNOW
but so far I haven't seen 3 different type of missiles for the Bavar 373 I have only seen 1!!!!