I don't know, I find it hard to defend such acts especially when you can clearly see the discomfort in women and children who get touched and in some cases even try to resist him. If it was a one off then I'll let it slide by if I'm feeling extremely generous, but knowing that it's not a one off and knowing how sleazy politicians are in general I can't help but be pessimistic. You see it as a "touchy feely" I see it as lack of self-control at best.
You're not wrong about Trump, but the question is when debate time comes and if this ever becomes a topic, does Biden even have the mental capacity to string few coherent sentences together let alone think on his feet and counter his arguments and accusations like you are able to in your post... I'd be way too hopeful for that.
I don't like the idea of voting for a substandard candidate whose only real positive lies with "not Trump," but perhaps I am so lax because I've always lived in states where the presidential outcome is already decided. Every time Biden makes a verbal gaffe (more often than not these days), I can only sigh and think to myself if this clearly broken man is the best DNC can put out to defeat Trump.
And as much as I'd like to see Trump lose in 2020, this is not the guy that I'd be confident in beating him nor do I really fancy him as an effective POTUS.