Seeing someone complain "On-chain front-running is back again," I actually understand quite well: you think you're competing with the market, but in reality, you're mostly competing with the ordering rules. MEV, simply put, is about who can insert transactions into a block earlier or more preferentially; the biggest impact isn't from "chosen big players," but from those with tight slippage, limit orders, or positions on the edge of liquidation—getting squeezed, getting front-run, turning costs from fees into hidden taxes. Recently, discussing validator income is normal too; where the money comes from doesn't matter, what's important is the pathway: when this "income" mainly comes from squeezing others out of the queue, the contagion between protocols accelerates—liquidations → price shocks → more liquidations... I personally now place more conservative orders; I'd rather be slower than become someone else's prey. You say, "Isn't that market efficiency"… well, whose efficiency?