You haven’t really addressed the 9/11 conspiracy in any way, but merely why conspiracies exist in general.

Generally, I agree with you. Conspiracies are perpetuated because people like to think they have special knowledge possessed by only a few. Also, a “conspiracy theory” is almost by definition unsupported by evidence. I’m a big fan of taking the advice of people more knowledgeable than me regarding their interpretation of evidence.

I don’t really know the details of 9/11, but I will say that a lot of credible people seem to support the false flag perspective.