The thing about poker (versus chess), is the notion of complete versus incomplete information. In chess, you know the location of every piece. This means you can compute possible positions (theoretically) until every possible game ends. Even better, you can play the algorithm against itself, since it can see everything either player knows. This makes chess computationally expensive - there are many positions, and you can do fairly meaningful analysis on every possible move. The best chess algorithms know how to aggressively cull paths which won't work well early on.
In Texas Hold'em, you only know ( initially ) your pocket cards, then as the rest come up you gain a bit more information. But compare this to the number of cards you can't see as a player. Those overlays they show on TV are effectively the best you can do; there's just no more data to work with. It's not like chess where throwing more computing power at it helps anything.
Poker strategy is based on large sample sizes - you're not trying to figure out the optimal strategy for a single hand, you're trying to figure out an overall strategy for groups of hands against groups of boards.
Winning strategy for limit poker is essentially making sure you're game theory optimal, so that there isn't a strategy someone can apply against you that will in the long run be profitable. You can't apply a simple greedy algorithm hand per hand, you need to be aware of the ranges of hands you could have and what strategies your opponent could be applying against those hands.
That is the not losing part, the winning more part is figuring out where your opponents arent playing GTO and figuring out if you can afford making your strategy exploitable to in turn exploit your opponents (because if you try to be always GTO you may not beat rake etc).
Looking at poker hand by hand is like looking at chess move by move.
Players can try to be GTO, but limit is not solved, so they are simply guessing. This post (and many others across the web) seem to assume that we know GTO or that we can reason it, but twe cant as this isnt a solved game yet
That's silly. You have an opponent whose previous actions you can analyze with an eye to the possible cards to come and the moves you can make. Add more players and the calculations are more complex. There's plenty of data for a computer to crunch on.
In Texas Hold'em, you only know ( initially ) your pocket cards, then as the rest come up you gain a bit more information. But compare this to the number of cards you can't see as a player. Those overlays they show on TV are effectively the best you can do; there's just no more data to work with. It's not like chess where throwing more computing power at it helps anything.