It's strange that you think that's what's happening here; if anything, the comment that the grandparent was objecting to was saying not to use a race car if you don't know how to.
Plenty of people this this comment section are saying that though, and you get it in every thread about Mac vs PC. When you've got basically the entire Internet telling you "Linux is a valid choice!" and then someone says "Linux isn't broken you're just not good enough to use it"... well, that's not really going to drive Linux user adoption, is it?
It's a "you're holding it wrong" moment. It's a completely ridiculous argument.
The issue I have with your characterization is the forced equivalence of "plenty of people in this comment section" and "basically the entire Internet" part of it. Don't get me wrong, there is definitely a segment of Linux users that vocally claim their choice is the superior one, but you could say the same thing for Mac and Windows. Given that there's no way to measure the number of Linux (or Mac or Windows) users who aren't commenting, it's a little presumptive to just assert that all Linux users are telling you your choice is wrong.
As an aside, I can't speak for other Linux users, but my goal is most certainly not to "drive Linux user adoption". If someone is interesting in learning to use Linux or wants advice about which distro to use, I would happily help them, but I actively try not to convert people who haven't expressed that interest. The reason I chimed in here is that I disagreed with the sentiment that Linux is a terrible choice. It's certainly not the right choice for most people, but there's a difference between being being niche and being bad.