lots of non-tech users heard that they can use plugins X Y Z for fun and profit, so they started to use them, but no one told them that managing dependencies requires some skill or at least discipline; that the fact some 3rd party pluggable software exists doesn't automatically mean it's good, viable, maintainable and safe; and that things in IT don't work by means of cargo cult, copy-pasting without underdstanding and by crossing fingers. So, there was a fallacy: these people believed (and many believe until this day) that they can remain being non-tech users while maintaining their wordpress-with-plugins installation, but it's impossible; one needs to become tech-aware in the process.

I am not sure what WP community did to dissolve this fallacy; maybe they did something. maybe didn't.