If you start giving refunds because you want to be nice, you would be violating the rules of other marketplaces which have their own policy on refunds.
I've never heard of a distribution platform that dictates the terms of your refund policy on other stores. That'd be between the developer and that other platform though.
The reality is once you start selling games, you have to treat everyone consistently, regardless of how you feel.
You're coming across as pretty condescending here. I'm not sure where you got this thing about giving people refunds "to be nice". Or why you seem to think I'm new at this.
I have two products on Itch, both of which have technical restrictions that mean they only work in certain countries. I do try pretty hard to make it clear on the store pages, but obviously sometimes people miss that, or they misunderstand what they're buying. In either case I highly doubt that I'm going to somehow get Itch.io or myself into legal trouble by giving them a refund. But point taken, not a feature you want. It's not something I thought would be controversial haha.