True. That is a major part, which is why Mass (The best prayer ever) is said so frequently and publicly. Other prayers, like LoH, which is the universal prayer of The Church, is also highly encouraged to be said publicly, although many people either don’t know about it, or don’t care for it, which is why (at least in my experience) it isn’t commonly prayed at the local parish. At my parish, over the summer we have monthly adoration and benediction, which includes LoH, and I think we were doing weekly LoH and adoration (with it being led by what I think is often referred to as “praise and worship”), but not with the Eucharist exposed. However, once school started, attendance drastically declined, and it was decided that we would wait till the summer to start it back up again.
Anyways, yes, public prayer is one of the main things that distinguishes The Church from your average non-profit organization.