That's an incredibly practical insight IMO. It's true: the more you focus on achieving your own goals, the less you care about what else is going on in the world; the most that you care about is overcoming obstacles, but that's the case regardless of whether they're caused by other people's conspiracy plots or random accidents (at least that's the case for me).
So even if you're absolutely right about whatever you think is going on, it's a losing proposition to take on someone else's conspiracy as a pet crusade.
RAW made conspiracy into art.
I loved it but I also know (and have known) some folks pretty deep into provably untrue conspiracy thinking. Honestly, it seemed to be a way to self-medicate with conspiracies for them. I don't think that my Illuminatus experience compares with what they're thinking in any but the most trivial way.
He has a quote about belief as a whole:
"My own opinion is that belief is the death of intelligence. As soon as one believes a doctrine of any sort, or assumes certitude, one stops thinking about that aspect of existence. The more certitude one assumes, the less there is left to think about, and a person sure of everything would never have any need to think about anything and might be considered clinically dead under current medical standards, where absence of brain activity is taken to mean that life has ended."