It makes sense from their point of few and they where founded as an anti European and anti British project
Furthermore USA objective was to secure North America for themselves and no other powers
The USA is also like an island and any invasion require massive amounts of resources and a large occupation army
Due to the guns in America itself that's neglecting its nuclear weapons in regards to other scenarios
USA is truly blessed but it's an Nations that isn't in denial regarding its Empire status and as a global actor for good and evil
Most Nations of their quirks what makes them weird to outsiders but make sense for them
I am english and I think with England being an island nation drawing up the bridge on the mount of putting hands in are ears
Is incredibly stupid and not really England historical norm going all the way back to 927
You much of English politics is affected by the USA due to its cultural influence and social media
Which is americanising the culture, the press and others