Isn't that the whole point of this post though? They've allowed you to edit files marked as "system files" despite a multitude of warnings, and now so many people have fucked up doing so that they've issued a stronger warning.

What's the solution? Put less warnings? Then you'd get even more people destroying their data. Put more warnings? Then you'd get more people complaining that "Windows doesn't let you edit what you want!".

It doesn't really seem like they can win.