How should we go forward when my brother isn’t managing his money well, and my parents have to step in?

I've got a younger brother in his late 20s and he is currently in a contract role (quite stable, but still, contract). He doesn't have much interest in anything other than gaming and because of that, my parents have to step in and ask him to transfer money to them in fear of him overspending on game.

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However, my parents are not too financially savvy as well and the money is just getting minimal returns in the bank.

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While this arrangement has been working for now, I know it can’t go on forever. Considering the opportunity cost of the money being the bank and my parents will not be able to manage his money for life. I tried to convince my mother to let him have a chance to manage his own money but things didn't go too well because money talk is sensitive...

Has anyone faced something similar? How do we guide someone in their late 20s to take ownership of their finances without it becoming a family conflict?

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Thank you!