After many more years in court than Brett Kavanaugh, one thing became very very clear: Men who commit violence against women are almost never able to admit it publicly. Many can’t even admit it to themselves. That includes physical violence and sexual violence.
It’s pretty obvious that the reason why it’s so hard is that it’s such an indefensible (and yes, despicable) thing. There’s absolutely no way for an offender to self-justify such mean and dirty violence. To admit it would admit to being rotten to the core. Thus, they deny.