My read on it was that this person heard what their coworker has to go through, and has formed an opinion based on that. I understand that climbing Mt. Everest is fairly difficult, despite not having done it myself.
I find how specific coworker complains about Linux while simultaneously demanding to use it pretty contradictory. That's why I am interested in more details.
I think it's fair to say that everyone in a company using very similar hardware and software makes maintenance much easier. But I also think any dev should be supported in at least _some_ Linux environment.