but surely some of the onus rests with the individual.
Oh, definitely. Some wrong teachings like "cats can fly" can be easily changed because of facts and truths. But there are some things that are difficult to adjust. Political views and religion are some of those things. Some of those are learned in school and at home. Some people are so brainwashed, and don't have the critical thinking to change.
Yep, politics and religion certainly have a lot to answer for.