It is useless unless they also understand probability theory, laws of averages, tell me how good you are after 100k hands. Chess gives you great feedback. You

It is useless unless they also understand probability theory, laws of averages, tell me how good you are after 100k hands. Chess gives you great feedback. You know why you lost. You learn a stack of new strategies to win. Poker you might win a lot of hands due to luck. Luck of the hands. Not just your but your opponent having a good but worse hand than you. Teaching poker is probably harder.