Epic gets a cut from every sale you make. Epic’s big data shows that such pricing tiers make more sales. You are ready to make a bit less sales for ethical reasons. However, Epic is not ready to lose its cut. You are on Epic’s platform, so you have to follow Epic’s rules. You can reassure yourself that you meant well, but the rules were forced upon you.
Even if it would be nice to make your own pricing, we need to acknowledge that FAB has much more important problems right now.