Lots of bullshit out there, no doubt. Lizards and the flat earth thing are probably the weirdest. There is always a very small percentage of people who are just as weird as it gets. But on the other hand, there are also people who believe everything someone in a position of authority is telling them.
Personally, I think this is a trick. They mix up people who "believe" in legit "conspiracy theories" like for example the covid 19 lab theory with those people who believe in the flat earth theory. The problem I have is: Once a certain topic is branded with the words "conspiracy theory" it becomes like a no-go area.