Critical thinking is something that people need to be taught in order to understand how to process information. It is the way to interpret it, and distill what makes sense from what doesn't. One can have a basic intelligence that can be honed with critical thinking skills, however without them intelligence in and of itself is not ideal. For example, I don't think Kyrie Irving is unintelligent. He just lacks the ability to make informed decisions because he's operating on some sort of "gut" instinct, as opposed to intellectually sound principles. Indoctrination, such as through the church, "patriotism" (ie, pledge of allegiance in school), etc. can also diminish one's ability to apply critical thinking to issues pertaining to society.
It's why the right wing goes on and on about colleges being "woke", try to cut funding to education, etc, despite the fact that most of their leaders attend Ivy League, or other prominent institutions of higher learning. Their sole goal is to create a theocratic society whereby corporations run roughshod and there are two classes - the wealthy and the subordinate. This is harder to achieve with a well informed, critically thinking populace.