It is true. I would wager than half the men in church would not be there unless their family was there.
I don't know where you get that. I'm Catholic and I don't see that at all. In fact, I see quite a few men at church every week who are there by themselves, me included. The same can be said of Protestants that I know. I have met many, many men , some of whom are good friends, who are devout Protestants and it is not simply because of their family.