You always say "There are many arbitrage opportunities on the chain," and I really want to laugh...

Many times you think you're picking up money, but you're actually paying for someone else's sandwich.
Especially those small pools that look "surely profitable"—once slippage opens, nonce gets messy, failed transactions burn a fee first, and the next one gets snatched by someone watching and squeezing in the order,
ultimately leaving you with just a bunch of gas bills replaying your life.

To put it simply, the real profit isn't "I'll give it a shot too," but rather those who can control the execution details: how to avoid being sandwiched, how to split orders, how to choose routes, how to monitor who’s lurking in the mempool for you...
Ordinary people see candlestick charts, but others see the fee margin of your order.

Recently, the community has been arguing about privacy coins/mixing compliance, and I actually think it’s quite similar:
You want "freedom," your opponent wants "monitorability," the middleman wants "withdrawability."
Anyway, I now prefer to move less, rather miss opportunities, than want to be a withdrawal machine on the chain.