This is excellent. Tellingly, you spend a lot of time talking about family interactions, which reminds me that the criticism leveled at Biden centers around people that are distinctly not family or friends. In his mind, I’m sure he felt he was extending warmth and kindness by treating these people as though they were family. (More cynically, we might note that it helped him to look like the sort of charmer who treats everyone like family.) But over-familiarity with near-strangers is a risky approach in any day and age.
I’d also add the obvious point that the few people who conflate Biden with outright abusers (of the Harvey Weinstein sort) don’t just harm Biden, they also harm us. If we are going to get along as a society and get people like Biden to adjust to norms that are more inclusive and more comfortable for more people, we need to have a way to inform and guide them to better behavior. In that context, it’s hard to see that shaming Biden accomplishes anything (except possibly make both sides of the argument harden their positions).