Yeah, I used to think so too. Then I started listening to and watching a lot of these discussions and my mind was changed. I am by no means an expert on the subject, I'm still learning. But there are far too many flaws, fallacies, and assumptions within the heliocentric model for me to continue believing in it. Even if you discard the idea of flat earth, the theories and observations that the mainstream claim and try to pass off as fact really do not align with much of what we observe, from my point of view.
I bet many open-minded people who are not married to an ideological belief would have their minds changed in the same way, if they just shut up and listen (in the nicest way).