One benefit was what I heard at Mass this weekend (which incidentally, I wouldn't have heard had I not been at Mass this weekend).
Again, [amen,] I say to you, if two of you agree on earth about anything for which they are to pray, it shall be granted to them by my heavenly Father. For where two or three are gathered together in my name, there am I in the midst of them.”
Mat 18:19-20 NAB
So, it is important for us to gather in one place and pray together. We could do this with informal prayer groups, but tradition has given us a formalized system for praying.
I pray the Rosary nearly every day, I'd like to say I pray it every day but I miss a day or two here or there, the reason I do it every day is mainly out of fear that if I miss a week, that week may become a month and that month may become a year, etc... So in the end, it's better that I do it every day.
Attendance at your church is the same way, make it a habit and it'll stick, lose the habit and you'll lose your desire.