No, I haven't played SS or CS. More interested in your general thoughts on risk-reward systems and RPG systems than in those games specifically.
I hit a point in Breath of the Wild where I had an abundance of weapons and didn't have to worry about wasting them. At that point I was fighting enemies because I enjoyed it, not because I wanted to get something. I was just wondering if you personally felt that way about any turn-based games. Recent Pokemon games take an interesting stance on this with the exp share, making battling for experience largely unnecessary.
I think the main reason for battling wild Pokemon is to catch them, anyway. So yeah I'd say - all other things being the same - wild Pokemon battles would be pretty pointless if you can't catch them, other than in special circumstances.