The problem is in who gets to say what is and what isn't a 'conspiracy theory'; and who is or isn't trusted to 'debunk' them.
I always find it incredible how many people readily believe that just about everything that is told us by 'baddie' countries (Russia, Iran, North Korea, China) is genuine conspiracies - and take it as a given; yet they call everybody who ever questions any official narrative from a 'goodie' (haha) country (any North American, Western European or Australasian country) a surefire crazed loon.
We also have the gaslighting whereby people question something that smells really off and are denounced as bonkers idiots; then that thing is eventually proven to be true, and so it becomes 'declassified' and acknowledged as a genuine conspiracy... but all of the other (as yet unproven or indeed mad) 'conspiracy theories' are obviously crazy, right?!
MK Ultra, Operation Paperclip, Blair's 'sexed-up' dossier, the Post Office/Fujitsu scandal... so many 'insane' people believed in these and insisted that they were true... and, oops, so they are after all!
Amongst numerous others, I definitely don't believe that we were/have been told the full true story about the deaths of Robin Cook, David Kelly, Jill Dando, Jean-Charles de Menezes, Jacintha Saldana and Epstein; nor that nobody in authority actually knew exactly what Jimmy Savile was up to, and that he was a lone wolf without any very powerful connections.