“War with a significant enemy will start nuclear right from the get-go”
I don’t think so.
“probably by us.”
Oh, that’s despicable. We went through over half a century of MAD, and never launched. That’s because we are the good guys.
We're the only country to ever use nukes against an enemy and just because we potentially use them first in the future, doesn't necessarily make us the bad guys. It could simply just make us the winner.