In 1986 at the end of a one week exercise at 29 Palms, Ca. I watch an Army CH-46 being chased across the desert floor by an AH-1W Marine Cobra followed by a U.S.A.F. A-10 pulling in behind the Cobra with a Navy FA-18 Hornet chasing the A-10.
Funny as hell at about 300 meters off the deck.
That said, you postulate two reasons why a dedicated anti-armor air system's ability to effectively operate on an Indo-Pakistani Punjabi high-intensity battlefield is "questionable"- 1.) Neither side should expect complete air-superiority (last I read that's called "AIR SUPREMACY) and, 2.) neither possesses a satisfactory SEAD capability.
Would you therefore say the same of your AH-1 Cobras?
You could be correct, though. The A-10 has never actually flown in the battlefield air defense environ imagined for CENTAG in the mid-70s/early 80s. DESERT STORM over Kuwait wasn't close. So nobody actually knows. Still, it's not like we postulated air superiority into our assumptions nor that the WARPACT battlefield ADA assets (both missiles and guns) weren't both considerable AND formidibly capable.
The threat justified the need for such a tank-killer, the battlefield tactical planning to accomodate such, and the risks accepted therein.
The scenario you describe is AIR PARITY-neither holding advantage in the skies. ADA may play into that somewhat, obviously. Still, even in perfectly-balanced scenarios of air-parity, local air superiority (and even supremacy) can be temporarily seized- to include fighter sweeps or escort scenarios for CAS assets-whether F-16 or A-10.
Until then, they rule over Afghanistan and we're sure glad they're slated through 2028. Can't imagine what will replace and I'm unsure that it won't be flying beyond then.
If you can get A-10s EVER, IMHO, you should jump to do so.