Also, the WP plugin ecosystem is almost as "dirty" as mobile apps are - few things are really open source, there's "please give us 5 stars" popups everywhere, fishy data collection, constant uspelling to premium offerings... It's just not a good experience to work with, unless you code most things yourself (in which case you will be absolutely disgusted by most of the API).
A bit like using windows. Some prefer Mac, some *nix.
Some are put off by php. Some don't need/want a SQL DB in the background.
Personally I like Kirby CMS (I actually don't mind the licensing fee). I am more productive and more flexible in it than in any other system I ever used. For personal and client projects.
But in the end it is often a choice of preference and that is fine.