Ite Missa Est

The difference between me and my friend is not just that I'm Catholic and he's Jewish, but that he meets people and knows them from his youth group and I meet people at church and know them from school. This difference is symbolized by the old ending to the Latin mass, Ite Missa Est. Loosely translated it means go or be sent. It used to be said as a dismissal for the congregation at the end of Mass. This mindset has remained to this day. When Mass ends at my church, everyone who can makes a run for their car and are gone as fast as possible. Very few people hang around. So this mentality keeps most Catholics from participating in things ouside of Mass. Or at least, that's my opinion. What do you think?