Thanks for the info. My take is similar to the relations of those individuals, and for the same reasons.
The fact that one of the (many) areas they worked on was related to a subject about which there have long been conspiracies makes their passing/disappearance ripe for inclusion.
The UFO field has made a lot of money for many movie makers, authors, YouTubers and self-made ‘researchers’.
I don’t believe it’s all fake; I believe people have actually seen inexplicable things. I just don’t believe ET guys are visiting us in spacecraft or that the government is covering that up.
But it’s sure been a cash cow for some people...