Except there are arts that do kata and don't spar. There are arts that spar and don't do kata.
Maybe but their is nothing stopping them from doing either.
There is no karate style that does a 10 mile run or uses a speed ball, until they do.
No, the training is how you develop the art. The fighting is the art. The ballet is the art. The swimming is the art. The picture is the art. There is no activity where the process of building the skill is considered the same as the skill it's self. A master carpenter may do extra training to be called such but if his table has 3 legs and one is short he won't get the title.
But OK let's say it isn't. Let's make an art a system of techniques that can be trained in any manner.
That's one aspect of a fighting art, arguably the least important one, but OK for argument's sake.
You still are going to have a list of techniques that are better than another list.
Better how? For what? For whom?
You might be right, but things are rarely that simple. For one thing if I spend 1000 hours training to perform a supposedly 2nd rate technique and another 1000 hours training to land it, so look as my training is efficient and effective the final result will imo have a negligible difference to the superior method. Even something that has tactical weaknesses like a grappling technique should be OK because your timing will be optimised and your understanding of the possible counters should be complete.
Again this is where efficiency comes in. Regardless of how you train. What you focus on. If you have an inefficient list you have to work harder to be successful.
Again, efficiency of what?
And by the way there really should be no fundamental difference between the benefits of kata for ring or kata for street. It will either help you fight. Or it won't.
I never mentioned any Street, I said training goals. Some people like kata for its meditative quality, some aim for perfect technique etc. Personally kata has expanded my tactical range, improved power generation and movement, balance etc and all when I had no partners to spar with.
Of course MMA does have its own study. They are called MMA fights. We can tell what systems are more efficient. Because they are more successful for a wider range of people.
And yes the point of MMA is to introduce better systems from other arts.
Except MMA also has dogma and almost everything that is in use now was considered useless at one point.
Not many people go to mma gyms and actually test a martial art. Lots test their training up to that point, but when they fail do they adjust their training and come back until they have a better understanding of their base art?
The people I've encountered usually get hit, get choked, get disillusioned (often due to over inflated egos to begin with) and then jump on the band wagon.
This thread is the first genuine study I've encountered outside my own. That being said I've yet to see what MD will do when stuff stops working for him.