Many people do not even donate, let alone tithe. Some of them probably can’t afford to tithe.
I don’t deny that tithing, volunteering, and being friendly to others are good, helpful things to do, but your original post specifically said that people need to be educated that “fellowshipping is a necessary part of membership.” The implication being, you can’t be a “member” if you don’t do these things.
The Catholic Church membership is available to all who follow the Church teachings and rules, and even if you don’t follow the rules you can still come to Mass although perhaps you cannot go to Communion or receive other sacraments. It’s important to make this distinction because there are people who read this forum who aren’t Catholic, and there are Protestant churches where if you don’t volunteer, don’t give a certain amount, don’t do this or that, you are kicked out, no longer a member, are not welcome at the services, etc. The Catholic Church is not like that. It is an important distinction.
I do not want to be part of a Church that requires or even states it is “necessary” for its parishioners to volunteer, or give money, or do “fellowshipping”. Someone who is unable to do any of those things should still be welcome to come and worship God in the Catholic Church, because God and the Real Presence are the main event and what the Church is all about. it is not a social group.