But for some reason not only have shadowy government agencies been successful at preventing alien artefacts from circulating in India, France, Zimbabwe, the former USSR and multiple regimes whose demise was much more violent than the breakup of the USSR, those states and their descendant states have actually kept a better lid on their programmes!

[1]though I'm not sure your other cited sightings also involving English speakers immersed in Western culture exactly undermines the implication that its a cultural phenomenon driven by US media. But perhaps aliens can't communicate telepathically in Shona or Ndbele...

The veracity of the above are all suspect, but the fundamental claim that this is something only Americans think about or only happens here, just doesn't reflect reality.

That’s GP’s entire point. If this sort of thing were happening to the scale being claimed—worldwide, instead of magically being confined to the US—we’d be swimming in verifiable evidence of alien artifacts being found across the world.

Instead it’s the same grainy, out-of-focus footage, data from sensors out at past their maximum useful range, and substance-free “leaks” with nothing hard to back them up.