I mean does it matter if whether it’s a good thing to want? WordPress powers 40% of the web because it was convenient, powerful, and easy for someone with basic web skills to hack around with. The same things that people complain about today made it so popular!
Besides, read-only file systems can be used to handle massive sites that need better security (like nasa.gov). And those types sites are either writing their own plugins or heavily auditing which plugins they use.
