Mathematically though- no.
Right now Tesla gets $0 in EV credits....
Under the new plan Tesla gets $10,000 in EV credits.
While it's true SOME legacy models might get 2.5k more, many others (the Mach E for example made in mexico) would get the same 10k.
And even for the ones that do get the "extra" union money it only puts them $2500 ahead of Tesla for government credits... that's
better for Tesla than the current $7500 difference.
Plus, of course,
any EV sale that replaces an ICE, from any car maker, advanced the overall mission.
Teslas been eating everyone's lunch with a $7500 disadvantage- I think they'll be just fine with "only" a $2500 one