The whole rocket weighs 414,000kgs but it can only only carry 2 tonnes.
Do u know a adult of 75 kgs carries a brain of 1.5 kgs and over 4-5 Kgs of waste within the body.. if u r smart u know 1.5 Kg is very important to regulate many things of the body.. so the weight at times is immaterial just like ur post with no coherency
In any case, JF-17 can perform anti-satellite role as well, don't forget that. In a war, all your satellites are juicy targets for the Thunder! All your communications and spy sats will be knocked out by the JF-17 the moment war starts. So there is no advantage to India from these satellites in case of war.