Because apparently this community belives that rocket artillery + medium tank would be broken, but only for usf.
Heavy tanks + rocket artillery + elite infantry is fine for other factions tho.
There doesn't seem to be any logic to the thought process with these commanders:
The OKW commander is a wet dream for 3v3/4v4, new shrek blobs that have AT mines and a universal sprint ability, and tiger for the late game.
But instead of seeing how OP that is they are instead trying to make the other commander ability as useful as possible.
Meanwhile the SU and US commanders are weak in late game and the UK commander is just ok, but the team seem to be fine with that.
Even with a 76mm the US commander would still be weaker than most meta axis commanders.