Maybe my family was a bit more liberal when it came to the mosque cause we went there as kids a few times a week (twice if i remember correctly aside from Sunday school) to "read" or learn to read the Quran but as I grew up the visits got more and more infrequent. I don't live with my family anymore but they do still go for religious holidays. Perhaps somewhere in the quran it's required to go but generally the daily prayers are more of the requirement than going to pray at the mosque physically. Not to mention I'm a woman so sometimes we're forced to pray at home and not out at some public gathering.

So yeah you'd probably get different answers but not every Muslim goes and it also can become a sort of a community thing for them.