Even if you know something exists, you might just have never tried it for some reason until something causes you to, at which point you might realize you enjoy it.
E.g., I got a bike over COVID, found I liked biking a lot, and have been doing it a lot more now.
From a user perspective, day trading is very similar to online poker or other gambling activities. The exception being that everyone wins sometimes, and everyone loses other times.
Anecdotally various betting games had a similar growth curve. People rush in when it’s easy, and then rush out once it’s hard.
E.g., I got a bike over COVID, found I liked biking a lot, and have been doing it a lot more now.