And that's what makes the combat good. With all the technical training bullshit out of the way, the series can focus its power design entirely on being obscenely awesome. Yes, there are series that have done very well with highly technical power systems, but other than Hunter x Hunter, they always seem to fall apart partway through.
Take Naruto for instance: At the beginning, the series had an excellently laid out power system for all the ninja techniques. But as the series went on, all the training stopped mattering, because any move you could possibly learn in a dozen years of concentrated effort is trumped by the guy who was born with the mutant ability to warp reality with his eyeballs.