All that needed to be said on the matter has been said I believe.
Most fighters agree to say the mental part of boxing is way more decisive than the physical part.
Well, despite having decent skills, size, strength and conditioning, Golota couldn't keep the mental part together, which is why he bit, low blowed while ahead, froze, lost all his meaningful fights.
Golota quit VS Bowe twice, quit VS Tyson, quit VS Austin, froze VS Lewis and Brewster (KO1).
And this guy is supposed to beat Wlad