Why would they??? You're religion teaches that without eating the wafer, there is no eternal life...Why waste their time???
Typical response from a Non-Catholic. It is never a waste of time to be in the presence of the Lord. We receive graces by attending Mass, whether we are free of sin or not. If they weren’t at Mass, what else would they be doing with that hour of time? Watching TV? Going to a movie? Sleeping?
BTW they also dress up in their Sunday best when attending Mass.