This includes 'soft skills' like body-language reads, speech-play, false-representation, baiting players into non-optimal play, as well as the underlying mathematical basis.
The luck element - known elsewhere as RNG Jesus - is mitigated completely over 10,000 hands by appropriately skilled players. There's a reason the composition of the final tables of the WSOP can be so static year on year, multiple bracelet winners wouldn't be a thing otherwise .
A fully optimised 'safe' player can be beaten both short-term and long-term live by a player who is skilled in reading tells, or simply bluffing. The BBV may be different, but the concept of a 'hero fold' exists for a reason - and is often more satisfying than a 'hero call' to veteran players.