

“Well we could immediately escalate any conflict to end human civilization” is not the boast you think it is.
Look at the current war in Ukraine – the closest we’ve come to direct conflict between two nuclear superpowers. Nukes are useful only to the extent they make the other side think twice about a large, conventional invasion. If you actually use them against someone who can retaliate, you lose.
“Essentially no different” is overselling it. “A lot less difference than there should be” is better.