That's where the Monastic Isolation religious belief comes in when you want to strictly focus on religious victory with them. But it only eliminates the negative pressure from your loss... The victor still spreads his faith! But that's more for an investment if you're chasing down 20+ relics. Cutting down on all that negative pressure helps. The reward for all this tricky, sometimes annoying play is an insane faith economy and being the leader in religious tourism. That being said, they're ultimately gimmicky and if I and to go RV, I'd rather play Russia or Gandhi. It really is a bad ability. There's usually no adjacency bonus for river spots, so you're giving up valuable faith adjacency for measly food and housing. You're better off ignoring it and try to get a holy site bordered my mountains. It's almost a negative ability!