This reads like a series of increasingly terrible decisions.
I don't have access to the full article but if they are laying the case for having Robinhood regulated (as I suspect) then I'd say what's even more unfair is preventing responsible people from having nice things because irresponsible people can't be trusted not to hurt themselves, or understand the risks they're taking.
Granted, that bit about gamefication does concern me, it's sort of dopamine abuse - I'd argue to an extent it's a dark pattern, just like frequent unsolicited attention grabbing notifications from other apps to encourage use.