I don't have to go to church. This one of those half right and half wrong statements. Surely everyone is encouraged to pray everywhere. But worship is not an option. And worship as God wishes is not just anywhere.
Church is where it happens.
If God has given a form for worship, it has to be the best because God gave it. Praying on your own can not even begin to take the place of uniting with Jesus as he offers himself at the altar. The Mass means Jesus is present, offering himslef under the forms of bread and wine just as he did at the Last Supper. His work of redemption goes on. You must be part of it.