Earlier quoted context omitted.
It's bloat caused by stuff like Electron, and people choosing to write desktop apps in HTML + JavaScript/TypeScript + some framework. If people even used a framework like Qt (a really mature and well-maintained desktop framework the favored framework of KDE Plasma, etc.), their memory usage would be so much lower. (I'm not counting the memory used by Qt's shared .so / dynamic library files.)
Is virtually every single company and developer wrong? Or is Qt actually not that good, forcing people to use Electron despite it's resource usage? I find it far easier to believe that Qt and GTK have fallen behind rather than the whole world is under a grand delusion and didn't know Qt exists.
Whether this is "right" or "wrong" is a difficult question to answer.