I think they're saying there are fewer, nothing about their ability.

There have been more geologists per area in the places where lots of astroblemes have been found. It's a selection effect, not a real effect.

> Africa, China and South America have wonderful geologists and people just like America and Europe.

Sure, but geology was largely created by Christians looking for proof that the bible was true, and then was later developed by people looking to prove that Christianity was false. So you have more geologists in areas with lots of people who have an axe to grind one way or the other with respect to that religion.