The pc is a kind of the lie, and most of the cases, the covering of truth. And anything, what covering from you the reality, it make you weaker.
It came from the fighting agains racism and sovinism, but like most of the "resistant", this turned around, against the primary goal.
Right now, the pc make the people definitely weak, because that is a limit, and a barrier against the clear, free speech. And yes, the truth can be painful, or can hurt peoples feelings, and this is the reason, the narcistic, fool people doesnt want to hear any unconvenient things, even if it the truth.
And the other side: racist and sovinism, and lately the feminism, liberalism not equals the truth, because these things arent facts, just opinions. Also doesnt mean, the free speech equal these things, because the free speech is just the right, you can be a racist IN WORDS, for example, and the right for others, they can think about you, as an *sshole.
But all the people know, if they doesnt like something, isnt not mean, that thing is racist/sovinist/feminist. Even if there are some brainless stupid, who think, their opinions are more important, than the facts.