> Even karate kid which shown some training, shown imaginary low effort low time investment training.
The point of his training is that the moves have completely become muscle memory/second nature. I have no clue how long that would take, but it would be significantly more than "low time investment".
Note also that (1) he claimed to have had karate training before; (2) after hebuilds up the needed muscle memory, training continues to teach him when to use what muscle memory.
2-3 years of regular training is a good guideline for the movements to become autonomic in real-time situations with fluent synchrony situational context, for someone reasonably coordinated at the start.
It takes over summer or something like that. He is 17 when movie starts and tournament he wins is when is 18 birthsday gift. Bulk of training is housework chores. No, you cant do housework for few months and emerge tournaments winning fighter out of it. That is literally plot of first Karate Kid.
However, it is kid/teenage fantasy. Which is fine! But not some kind of hard work message movie.
The point of his training is that the moves have completely become muscle memory/second nature. I have no clue how long that would take, but it would be significantly more than "low time investment".
Note also that (1) he claimed to have had karate training before; (2) after hebuilds up the needed muscle memory, training continues to teach him when to use what muscle memory.