The only points I would make are these.
There is no need to go to church given you can be with God anywhere. However some people, or me at any rate, need the routine of going to church as well. Not for the rules or the pleasing my fellow catholics. It's probably like having an attachment to your Gran's house even though she died years ago.
Regarding quiet prayer. That is a big part of my sister's life. She is a nun and from time spent with her and knowing her so well, her prayer life is the most important part of her life. The day to day living of the average Catholic , I suspect, has the bread and butter prayer that we grow up with. This can be comforting but for me that's as far as it goes. There are, however, people like me who work towards a deep and meaningful relationship with God. I suspect most of these people, like me, find it difficult, frustrating, occasionally uplifting and nothing like the image conjured up by the thought of mystics and others. Anyone taking their prayer life seriously is going to spend a lot of time struggling. If the longing for God wasn't so deep I would give up but I haven't found anything that matters as much yet.
Having said all that, I am aware that religion and especially Christianity has done a great deal to give itself a bad name. Sometimes you have to shift all the crap to find the beginning of your journey.