Some variants of poker are much easier than others. Texas Hold'em is considered to be one of the most strategically challenging poker games and there has been quite a bit of research on Hold'em bots. The current state of the art is this: computer players can defeat human players below the professional level, but professional players still run circles around the computer.
There is a HU FL cash game machine in casinos in Nevada. You can find it in the Aria and other places, i think.
It is rake free (i.e. the house doesn't have an 'advantage'), it is a fair deal. You can go and play it all day 24/7 if you wish. You can play up to $100/200 and $200/400 i believe, and hands are dealt very fast.
Despite some failed attempts, you won't find today any professionals sitting there "running rings" around these machines and making bank.
For a human to learn and become an expert winning player? I doubt it.
There's still the NL frontier, but FL seems to be done.