That "free market" situation is literally because they want to crash it, nothing more. If someone offers you at $22 a piece for ALL your coins, and you instead go with the one that will crash the market if you sell it all, then you picked the one where you make a loss.

But he is right, because while he would make a loss (well binance would) that means FTX would do worse as well. And that is all they want, FTX to do worse, they are an exchange and so is Binance so making another exchange go down as a competition is something they would love to do. Why not destroy another exchange if you have the power to do that? It is only a good business deal for them, and it would bring them more customers.