My guess would be that if something like 9/11 happened again today, you'd see [tribe controlling the White House] try to use it as a unifying event, and this would immediately catalyze a furious reaction and counter-narrative from [tribe not controlling the White House] denouncing it as cynical grift, especially if it was used to try and justify a draft.
The topic goes quite deep. I'm sure better minds have written books arguing the specifics.
If the Japanese had not attacked, the United States certainly would've entered the war later, but I don't think you could ever refer to it as a "power play".
Ascribing intent is tricky here. Personifying the modern state is another iffy area. "Directed history" is another can of worms.
Inevitability isn't the question. Rather, "power play" in terms of post-hoc analysis is the only question we can probe. Suggesting otherwise is a leap beyond conjecture.
Without implying that this was the analysis at the time, we can safely say that the US was positioned to be the sole remaining industrial superpower post war, if the US entered the war at the time which it did. If it had entered earlier or not at all, this may not have been the case.
The original comment was concise. Perhaps it was appropriate for a simple assertion, but it did leave room for ambiguity.
My reply was directed towards the idea that the US entered WW2 as a "power play", not that the outcome of the war resulted in more power for the US.
The primary reason the US entered WW2 was because of Pearl Harbor.
Entering WW2 is the most righteous thing the US has ever done. I know that the US has done a lot of wrong, but I cannot imagine how much more suffering there would've been if the Axis had won.
If WW2 wasn't existential I don't know where the bar is.
Also there was a Japanese plan to unlease the plague on San Diego - it was ended by WW2.
Not...quite sure how much of a threat "attacked Hawaii, allies under attack, plans to send plague to San Diego" all groups up to be, but yeah it was existential.
You can relatively easily conceive of scenarios where the US either needs to directly confront China, or lose its geo-strategic preeminence, but it much much harder to conceive of scenarios over the next 50 years in which direct confrontation with China is 'actually existential' (in the sense that if the US loss or did not partake in the confrontation, that the US would domestically cease to exist in a recognizable form).
Effectively, the US' challenge for recruitment (and honestly a lot of things) is to convince enough of its population that US hegemony/preeminence is "a good thing" and worth fighting and dying for.
Too bad the US pissed away a good chunk of that capital with GWOT.
Slowly boil the frog by removing internet freedom for 50 years, and close down independent media outlets, prevent growth of organic networks? Sure.
There's no guarantee that our freedoms continue unabated. Look at Jan 6th and how dangerously close we came to authoritarians seizing power. There was a false elector scheme!
Or a "backdoor" where as soon as the authoritarians grab power, they flip a switch and the only networks you have are ham radio enthusiasts. Not good.