True enough. But if enough of the techniques are "esoteric" (my term for techniques that teach a principle, rather than having direct application), and you spend too much time on those, you aren't spending enough time training the movements that you'll need.but the part that matters most are the underpinning skills, those are repeated in all of the many forms. The only real question is do you practise those skills in,a few ways or many ways.
its all, block move punch kick at the end of the day, if you can do those to a good level you are good to go