It doesn’t require counting cards, as he there isn’t any long term play (blackjack uses the same initial decks for multiple rounds).
But you’re right that he could calculate probabilities of each person having other hands. However, the thing with poker is that it’s about bluffing and choosing when/when not to take risks. He could build profiles for each person, but that assumes a consistent plan/strategy.
It doesn’t require counting cards, as he there isn’t any long term play (blackjack uses the same initial decks for multiple rounds).
But you’re right that he could calculate probabilities of each person having other hands. However, the thing with poker is that it’s about bluffing and choosing when/when not to take risks. He could build profiles for each person, but that assumes a consistent plan/strategy.