One of the things to consider, in many inexplicable crisis situations, is that there may be deep state actors fomenting trouble. Of course, given the nature of the infiltration, it may take a long time to really establish the truth. Typically, we can only go on probabilities and circumstantial evidence..
Once you accept that deep state actors, and rich and powerful people in general, with messianic or psychopathic traits, do some very nasty things, you start to realize that those who do not look for conspiracies are the deluded ones.
Not all conspiracies theories are correct, but this is perhaps just a general statement about what we can know on any complex topic, and is hardly special with regard to conspiracies.
There is no shortage of useful idiots to follow along with a mad plan in any case.
Hey, there are still those out there maintaining the lone gunman theory about the JFK assassination, even though a senate committee, 10 years later, deemed it to be done as part of a broader conspiracy. Of course, that was another exercise in obfuscation I imagine.