It's pretty much like drugs or gambling.
Sure, the tiny rushes of dopamine are free, but that's just enough to get your foot into the door and pretty soon they won't hit the same. If you don't quit while you're ahead, it's either gonna financially ruin you or turn you into a zombie that never uses its brain for an extended period of time and you end up writing posts like this one to self-rationalise your completely irrational behaviour because you've been scared into thinking your career is gonna be ruined if you don't keep diving head-first into this addiction.
Not a coincidence that this is happening at the same time as "bet on anything" apps.