That's kinda good to hear - I suppose - but they only did that after the consequences of their destructive actions became clear to them, even though nearly every other intelligent person on the planet had been warning about that.
Impressionable baby techbros here on HN still quote them on that stuff, so the consequences of their multiple fuckups haven't finished playing out yet.
"Hindsight" would be recognizing "oh shit, I'm a fucking idiot and I didn't realize it." But they haven't actually reached that level of hindsight yet.
Essentially, Matt Stone and Trey Parker are enthusiastic heralds of the idiocracy.
They kinda made fun of Hillary, but nothing beyond she's lame and a bad campaigner. And they were a little hamstrung there considering they were jumping ahead of the real life election cycle a bit.