Build anti air if you don't like P-47's
This is a simple answer for an issue that can far more complex.
Firstly, you are completely ignoring map design, pathing and input delay. Any other callin ability, once you see smoke you can hit retreat, or in the case of atg issue move order and you are relatively safe. If you are slow to react, then you may suffer some casualties or loose entire squads.
The problem with P-47 is mainly map design and tanks propensity to go retard and start doing 360 and getting stuck on objects. Further more depending on where you call the strike it can be possible to simply be trapped with nowhere to go. 6 Months ago a similar debate was had about sov skill plane just obliterating infantry, this is no different and its amazing that relic made same mistake...
Secondly, as ost AA can often be a roll of the dice, shooting down planes immediately or completely failing the entire game. This is why debating and balancing something like this is virtually impossible. RNG is skewing balance..
P-47 should not be left in its current state simply because USA armour needs adjustment. That is just more bad design.