[nomadking]

If JK Rowling wasn't already well established, would she have been published nowadays?
You have to be able to criticise things, people, groups etc, otherwise you end up with a very distorted and one-sided set of view of those things.
If something is factually wrong, then somebody presenting those incorrect things can be proved wrong. As opposed to the current system of "I don't like it, so you're not allowed to say it, no matter how true it is".