For what it's worth here's my take on it from what I've experienced in the last few years.
The worlds is becoming a more complex and troubled place. The more prevalent the internet has become, the more people are able to see this. Mental health and anxiety are skyrocketing and people are desperate to make sense out of chaos, even when that's not realistic.
Conspiracy theories take all of that chaos and wrap it up in a neat little bow with enough grains of truth and (on the surface) logic that it's comforting. There is absolutely corruption in the world, there are absolutely conspiracies happening in different places and for different reasons. Power is being abused all over the world. I think it's good to question and to look beneath the surface. My problem is that when some people try to find answers, they end up going down rabbit holes into communities that try and connect all of this into absolutely wild, vague and mostly contradictory wider conspiracies and suddenly people who were asking rational, valid questions are now zombies, mattering talking vaguely about "them".
Once people get to that point, their standards of evidence get progressively worse. Where they would have been doing real research on individual topics, now they're directing me to a blog or a video of a rant by one of their compatriots as "proof" that blood drinking monsters are secretly coordinating every element of day to day life.
My Aunt is fully down he rabbit hole. She leaned over the table at lunch one day and asked me quietly whether I knew that "they" were softening children up by normalising paedophilia. She showed me a post which had a snippet of this picture book that was allegedly being given out in UK schools today. The post showed two pages which were along the lines of "uncle tommy's gets in into little Timmy's bed at night" (can't remember the exact words) with cartoons to illustrate. No other context. I Google'd some of the text when I got home and found the whole book eventually. It tells the story of a kid from an unhappy home who's parents fight a lot. His uncle molests him when he comes to visit and he grows up to be gay. He visits a doctor who cures him because being gay isn't a thing. It's a response of a child looking for the love he didn't get from his father. Paedophilia is only a sub-plot and it's actually a wildly anti-gay piece of work by some guy in the USA in the early 90's. Yet my Aunt sees this post with 2 pages out of context and gives it credibility because it comes from her new community who "see the truth" like she does. She also sold her flat and, for a while, tried to buy a plot of land up north that she could retreat to when "they flip the switch".
Believe in conspiracies by all means. They do happen. But for fuck sake, don't surrender your own ability to reason and hand it over to others.