Love this comment, it is the epitome of Hacker News. It points out all the ways the OP is wrong, while simultaneously confirming the OP's point in the first place: don't be a retail trader because you're not properly equipped.
For myself, as soon as I realized that retail trading doesn't make much sense, I personally haven't bothered learning an exactly specific mental model of why. You almost need to be a professional finance person to even understand the specifics here. For now my model is: "making money in derivatives markets is really complicated and hedge funds invest large sums to counter this risk, so unless you're willing and able to match their investment you're unlikely to see their returns."