Not a silly question at all! 78% of users cannot handle WYSIWYG editing, as you have learned!
When you create a user, you can specify an editor, or "no editor". I’m always a super-admin, so I don’t honestly know if you can prevent a person from changing their editor preference if they’re a lesser security level. Maybe "Manager Manager" can help with that.
You could also, I think, set the main admin config for "no editor", and then make your super-admin account have one, I think.
Any of the above could be tried pretty easily, in any case.
I hope that helps!
Dave