So are you saying that a bot that ONLY looks at the visible cards and not at the actions of the other players, will beat human players? Because that's what you seem to be saying and it goes against everything I know about poker (which is, admittedely, not that much). Poker is all about deception, getting people to join in instead of folding when you have a good hand, betting big with bad cards if you suspect the opponents also have bad cards, but not too often so they don't call your bluff, etc. It's an extremely complex psychological game. If you just play by the mathematical odds of the known cards, and especially if the opponent knows that you're playing that way, you're simply a fish. They can tell what cards you have by the amount you bet, and this gives them a huge advantage.
The only reason why the researchers were able to "solve" the game (or at least claim they did) is because they played a very limited variant with a low number of possiblities for bets, drastically reducing the opportunity for psychological games so that math can indeed prevail.