The problem is that a lot of sellers have a high minimum order.
You don't need a lot of sellers, you only need one. Kraken for instance (and to my surprise) has a minimum Ethereum withdrawal of 0.000108 Eth with 0.00009 fee.
I still wonder why most exchanges are still rigid with very high Ethereum Withdrawal fees. The network transaction or gas fees have been quite down for some good time, right now. Some of these exchanges are just being too exploitative, IMO. It's not like Ethereum has UTXOs like the Bitcoin network
Guess they have to keep pushing their EVM like chains regardless.