"applications they want" is kind of hard to convey though. If you run a game with a rootkit, is that something you "want"? If you open a malicious document and it ends up encrypting your data, did you "want" it? Do people who install toolbars "want" the spyware or cryptocurrency miners that comes with them?

A modern operating system tries to guess what the users "want", because that's by no means clear.

Of course, it's a matter of judgement, and judgement comes with its own problems.