Earlier quoted context omitted.
Cause and effect is reversed here. The trends leading to collapse of the family , neighborhoods and friendships predate facebook by at least 40 years. Bowling Alone describes the collapse covering the 80s & 90s, and the trends were 20-30 years mature by then.
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.
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.