Realistically Trump would have at least attempted to defend himself if he was actually innocent barring worry about being forced to reveal even more incriminating evidence (which for the purposes of this conversation would actually be worse). The only other reasonable explanation I could see applying would be if he just didn’t care, that he felt the judgment would be small enough he could effectively ignore it, and that he knew his base wouldn’t care because they never believe he does anything wrong. That still seems to run counter to his usual behavior though and would demonstrate a level of calculation that literally Trumps entire life has shown him incapable of, although maybe for once he actually listened to one of his advisors.

While the court case isn’t absolute proof of his guilt, it does weigh very heavily in favor of it. I think it’s highly misleading to say it neither supports nor refutes the allegations of rape. It absolutely supports those allegations, it just doesn’t unequivocally prove them.