Listening closely

Is this a joke? I don't understand. With Bitcoin, I can see the concern due to its history, but why would it matter if your Monero comes from a miner? Also, as I understand it, only large companies, exchanges, and governments are interested in acquiring "clean" Bitcoin.

src: https://pitchprash4aqilfr7sbmuwve3pnkpylqwxjbj2q5o4szcfeea6d27yd.onion/p/bde14182#p-142a4ab3

If Monero has perfect privacy, why is Monero working on enhancing it's privacy? No matter the current state there is always the chance that every transaction on the blockchain could become exposed. Financially, it is better for the MCEP for miners to not sell to exchanges.