No no, everyone does it so there is no point in criticizing one and not the other.

Everyone doesn't do it because they can't and it it's still more than fine.

The US is the world's sole military superpower and post WW2 has been singularly responsible for the world being the safest it has been in recorded history, both in terms of large wars (including large powers going to war with eachother) and weaker nations getting annexed by stronger powers (a now rare event and historically common).

If North Korea wants to invade and annex South Korea, they'd have to go through the US. If China wants to take territory from Japan, they have to go through the US (ask Biden, he just confirmed that for Japan, to their delight). If China wants Taiwan, they're afraid they'd have to go through the US (or they'd have already taken it). If Russia wants the Baltics, a chunk of Finland, part of Poland, or Romania's Black Sea territory, it has to go through the US.

Who else provides that blanket for the world?

The US should be spying on what everyone is doing militarily, without exception.