while the last point is perhaps the main determinant theory behind why many older people are not being owing more right wing, I'm a little confused by your first two points.

especially the fact that people have greater access to knowledge and are forced to think more critically. if anything, with the advent of the internet, echo chambers have never been easier, preventing critical thinking. this leads to a growing of extreme positions which further reinforces such views due to tribalistic fallacies in our thinking and the need for these tribal identities to distinguish themselves.