If you talking of users who dont install their own software and just use browser only then Linux was better for them for decade.

Now you can even install something with read-only system partition with snapshots so not even a power outage can corrupt anything.

For non-power users who do need to install something it was never perfect, but now these immutable distributions are here. They have their own downsides though.

Guessing this is just a hypothetical, but if you really can do that (disable the DM via the GUI by accident), I'd be curious. If you told me to do that on purpose, my first instinct would be to uninstall the package.

Which few bad clicks would put a fedora install in that state?

I guess you could use something like Fedora Silverblue if you feel like doing some initial explaining.