But David Fincher, AFAIK, didn't go out of his way to defend himself on Alien 3 on his own time. The media outlets asked, he answered, in his own distinctive style.
Trank is going out of his way to defend himself, on Twitter and if you believe that the posts on 4chan are from him. Nobody asked him for his opinion, he's just saying it of his own volition. And that's why he's likely going to have trouble getting hired by a big studio in the future. That's nobody's fault but his own.
Many a celebrity would be better served if they weren't on social media, period. If you ARE on social media, you need to watch what you say.
And you say that Trank is better accomplished than me, as if I wanted to be in the movie business in the first place.

I did cancer research, and changed industries because I wanted to help people faster. Just try me about "accomplishments" and "making the world a better place."
And yes, the cancer research card is what I'm going to play anytime anyone tries to make THAT argument against me.