(with some genuine good quality researchers here and there, Vallée for example)

I think Vallee is full of shit too tbh, although it's an uninformed opinion based on some excerpts of his books. It seems to me like he too often believes "witness" testimony and then spins his tales of control systems and interdimensial whatnot because really all you can do is make up some Marvel multiverse like lore if you want to piece together every cooky story you've heard. Also the case he based his last book on seems to be a hoax: https://douglasjohnson.ghost.io/crash-story-the-trinity-ufo-crash-hoax/