What to do about it? Nothing. You should probably stop thinking about it.

My sense is that you could remove Steven Greer and it would be something else? Sorry I have a rather pessimistic take.

JFK conspiracy theory content is second to the "antigravity technology stolen from aliens" on her list, so you're not wrong, but Steven Greer has the same reach as those fricken JFK conventions. He'll never go away...

Replace it with Game of Thrones?

Didn't he start seeing ghosts or some such and started a spiritual ritual camp thing in the desert?

Yeah, he has a retreat or something I think, billed as more expansive (and expensive) than a tour through the desert.

Edit: found his expeditions

Procedure: If you have not been to an expedition before the tuition fee is $2500 – $3500 depending on facility costs. Each expedition is different.

https://siriusdisclosure.com/expeditions/expeditions-w-dr-gr...

I have a good friend who went down that rabbithole instead of seeking help and it's consumed him. The obsession is so bad that he lost multiple jobs and became homeless so he can focus on literally talking to aliens using the methods Greer sells. He gives what little money he has to grifers like Greer and the cottage industry that popped up to take money from those with the beliefs he promotes.

I'm familiar with the hopelessness, there's really not much you can do but try to help nudge them into healthier directions without being overt enough for them to shut you out for denying their beliefs.

I've had some success with things like Mirage Men and Mick West's work in helping them understand that there's a lot of manipulation in that space and that not everything can be assumed to be aliens, and it's helped a little, but I've found that they just integrate that information into their belief system. Those people are lying about aliens/UFOs, and that UAP was just a weather balloon, but everything else is real. They've been more discerning about who they give their money to, though, which is a good thing.