Presumably they are excluding non-native Germans using difficult German language requirements?

Tbh I wish my current employer had higher (or any) English language requirements. It makes meetings (especially video calls which is all of them) significantly harder when you have to decode heavily Indian English as well as understand highly complex technical discussions.

I get you, but credentialism is an issue in general - the best AWS expert isn't usually the one with the most certs. Likewise I don't have any sort of advanced English or German cert. I have B2 in both, but my German is a lot worse now, but at my best I had no trouble interacting with my German coworkers or society in general.