He's obviously unrepentant. Despite visual evidence to the contrary, he's still trying to pass this off as a mistake. If you watch the tape, you can see that he's aiming for exactly where his hand landed. And he's tall enough that there's no way he'd hit that low with a sloppy aim.
Yes, what he said was obviously self-exculpatory nonsense, and I would imagine that if he continues to display that attitude in court, then it will not go well for him when it comes to sentencing.
In an ideal world, that sentence would include a mandatory course for sex offenders, but the problem is that they last for three years (or the ones we have in the UK do) so they're generally delivered inside prisons.
Obviously they can be, and are, delivered delivered in the community, as part of a non-custodial sentence, but the way our sentencing regime works makes it very difficult to justify giving the offender a non-custodial sentence including three years' probation rather than a prison term of no more than a year or so, and certainly not long enough for the offender to take the course while he serves his sentence.