At some point computers need to stop being treated as magical boxes that no reasonable person can learn how to use safely. We expect people who use cars to learn how to use them safely, we expect people who use lawnmowers to not stick their fingers in them. Computers have been a part of daily life for normies for decades at this point, it's infantilizing to suggest that average, non-tech savvy people can't learn to use (not necessarily build, repair, etc.) them properly and need to be protected from them.

And e.g. browsers cracked down on it, removed toolbar support and powerful add-on support AND enforced signing meaning everything goes through their gatekept extension store and these problems still persist (e.g. addons changing the search provider, new tab page or homepage). Locking everything down does not help.