Your theory is that Facebook not only had no impact on that but could have done nothing to improve things?

That seems implausible to me. I think at best you could claim that cause and effect are quite tangled here.

I wouldn't say no impact, but a trailing impact. They understood the cultural changes demanding new ways for people to status signal and maintain connections with friends & family.

That's what I mean about reversing cause and effect. There are larger causes (see my other comment below) that Facebook was innovative to take advantage of.