Not necessarily. Discernment and critical thinking is essential to not being a cultist basically.
It’s more like, you need to know the reason for your doubt. Is it based in objectivity? Is it based in emotion? Is it based in intuition? Is it based on past experience? And then from there you need to evaluate how good of a reason that is for the doubt, and weigh the possible benefits of being open to a new perspective, even if you decide not to keep it. You can try it on temporarily, like a new hat