Cured zombie villagers discounts are game breaking (1 pumpkin/melon for 1 emerald)

I haven't played for a while. Started a fresh game on 1.15. Cured a zombie villager. Made him a farmer. I remember the old days of 8 to 13 pumpkins/melon for an emerald and I think it was already game breaking (too easy). Now, you can trade 1 pumpkin for an emerald with the discounts... Extremely game breaking imo. The introduction of trading and the mending enchantment were very game breaking but this is taking it to a whole new level. The problem is it makes mining absolutely obsolete. It should be at least 5 pumpkin/melon for an emerald at best. Same thing for the librarian. 1 emerald for an enchanted book instead of 18 emeralds? 20% off for your good actions would already be a deal, but 18 emeralds to 1 is 95% off. Do you guys realize that?