It's a valid comment. Most of the 'replacement for macOS' comments here essentially pre-suppose that people only use macOS because it looks pretty and...? What? That people just play with Finder and TextEdit all day?
If I can't run Lightroom or Affinity Photo on ElementaryOS (hint: I can't) then it isn't a replacement for macOS.
I know I can use DarkTable or GIMP, but I don't want to because they are lacking in various ways that make them less useful, to me, than the apps I named above.
(I've been using Linux as a daily driver for two years now, have been administrating Linux servers for nearly two decades - I know Linux).
Of course, you just know that the answer from most of the hardcore Linux people will be that you should "get involved" with the projects you named and contribute code - whether or not you actually know how to program is inconsequential. Linux, after who knows how long, is still not ready to be a primary desktop OS, and for one major reason - it's not ready for 100% ignorant end-users.
Because it's being called a "replacement for Windows and MacOS". I take issue with that, because it's provably not. All use cases are valid. It doesn't matter if you're using it for work or play, there is no invalid use case as long as it works for that user. And if you're touting an OS as a replacement, you have to take that into account.
