There's too much emphasis on guaranteed next block confirmation.
True, and there is also a general lack of knowledge regarding how mining and average block times work.Meanwhile, the exchanges are making so much money that network fees are a write-off to them, so nothing ever changes.
Don't forget that 95% of the time exchanges are making profit on their network fees too. Most of them are charging anything from from 20,000 up to 100,000 sats per withdrawal. During the majority of the time when average fees are <10 sats/vbyte, and when withdrawal transactions are batched to keep their size to a minimum, these fees are a gross over-payment compared to how expensive the withdrawal actually is. I know they have consolidation transaction to do in the background, but they still make a nice profit on withdrawal charges.Even when fees are high, as you say there is no incentive to change because their withdrawal charges are so high anyway that they still easily cover the increased fees.
