If you understand finance and aren’t specifically attempting to arb on that timescale, you actually want to participate in markets with those participants, because their presence gives you less variance/better price discovery on the scales that don’t factor into your decisions to buy and sell things.

So basically if you’re larping as a trader you will consistently get your ass handed to you unless you are genuinely better than all the pros, but if you’re investing or optimizing for a specific risk profile/exposure/timeline you’re playing a different game.

Anyway the fact that it’s so hard to explain this stuff to individuals does strengthen the argument that most individuals are better off following the herd.