Earlier quoted context omitted.
And this is why there will never be a Year of the Linux Desktop -- no-one wants to have to depend on forum posts to fix these kind of issues. /troll
This issue in GP is unrelated to Linux, it happens on single-boot macOS.
That's the point, I think - Linux gets derided because people say it just breaks at random and you have to wade through forums to find arcane incantations to fix it, either implying or outright stating that their favorite proprietary OS would never just blow up in your face and force you to resort to exotic troubleshooting steps. So when macos, the poster child for "user friendly", proceeds to brick the machine and require elaborate rituals to fix, it invites a certain level of snark from users pointing out that the high and mighty proprietary OSs might be just as bad as Linux after all.
Of course, whether that's valid is at minimum a question of actual frequency of problems and relative impact and effort to fix, but from a perspective of optics and emotions I understand the reaction.