Linux is super fragmented (and generally has been historically).
If more people in Linux agreed to develop, use, and support the same distro–similarly to how most of us use the same kernel–then that distro would probably be better than Windows and more people would move to Linux.
I see no contradictions between “simple is good” and “monolitic/corporate based like windows and macos tend to be shit”. If anything, reality is the opposite of what you think. We can have many different simple and ready to go distros, i mean that’s like the whole point.
If you install windows, for example, you can use it for many things, and it’ll be mid crap in all of that and need hours of setting up (not to mention some mandatory scripts to get the bare minimum of efficiency, privacy, and clean adware and bloatware). Then, if you need to game, just install nobara and go. Need to do office or web-based stuff? Mint all the way. Same thing but you like apple aesthetic? Try Zorin. I could go on and on for hours with different use cases and distros, but you should get the thing by now.