With "scary leaders of countries who aren't actual allies", Starmer probably wouldn't have anything like as much to lose.
The stakes were incredibly high at yesterday's meeting, and while the US has historically been an ally, Trump has already demonstrated that we can no longer rely on this. After all, it was only this week when the US decided to vote alongside some of those "countries that aren't actual allies" at the UN - Russia, North Korea, Iran...
Frankly, it would be worrying if Starmer hadn't felt a bit nervous in that situation because that would suggest a concerning lack of understanding of the dangerous geopolitical reality in which we now find ourselves.