PhD is doing something very niche, intelligence and logical thinking makes it easier, but you can easily just submit a paper in multiple journals until one accepts. Of course your advisor and committee are supposed to weed out those people, but in this culture where more students graduated -> faster tenure +more funding, and everything is measured in numbers, everyone is encouraged to increase the numbers instead of quality. So just because you were able to publish something in a small niche field doesn’t mean you know a lot about the world, or you agree with what other scientists think.

I know different universities and countries have their own system which probably have higher quality control, but this publish and perish culture combined with the competitiveness and lots of money involved in all steps is bound to game the system towards anti-science. Professors don’t really have the luxury of trying things that don’t work for years anymore.