I'll approach this with no real reference to kenpo/kempo, in hopes of removing some of the attachment to some of these ideas (and because I know almost nothing about ken/mpo ).
I think some level of theory is important - knowing why a setup/entry is done a certain way (to break structure, close off responses, etc.) is important. Knowing it as a specific theory is not. Whether someone knows my structure-breaking approach, speaks of the principle of kuzushi as taught in Judo, or whatever, that doesn't matter - so long as they know they need to do that thing (breaking structure/balance) before or during a grappling move. The same goes for using angles and levels in strikes. They need to know why they change angles and levels, but whether they know it as the triangles seen in Silat, the angles discussed in Shotokan, the western Boxing model, or using Wing Chun's centerline concept isn't all that important. Specific models only matter, IMO, insofar as they become a common vocabulary (and, thus, a shorthand) within a specific group. That means they matter more within a school than within an art.
Some of us REALLY like discussing the theory and concepts. I'm one of those. But I also know that this level of discussion isn't important in general to developing functional skills...at least not for everyone. Some people learn faster when they have a strong, robust conceptual model to work with (that's me). Most folks don't benefit as much, and some will actually find it more confusing than helpful.
I think some level of theory is important - knowing why a setup/entry is done a certain way (to break structure, close off responses, etc.) is important. Knowing it as a specific theory is not. Whether someone knows my structure-breaking approach, speaks of the principle of kuzushi as taught in Judo, or whatever, that doesn't matter - so long as they know they need to do that thing (breaking structure/balance) before or during a grappling move. The same goes for using angles and levels in strikes. They need to know why they change angles and levels, but whether they know it as the triangles seen in Silat, the angles discussed in Shotokan, the western Boxing model, or using Wing Chun's centerline concept isn't all that important. Specific models only matter, IMO, insofar as they become a common vocabulary (and, thus, a shorthand) within a specific group. That means they matter more within a school than within an art.
Some of us REALLY like discussing the theory and concepts. I'm one of those. But I also know that this level of discussion isn't important in general to developing functional skills...at least not for everyone. Some people learn faster when they have a strong, robust conceptual model to work with (that's me). Most folks don't benefit as much, and some will actually find it more confusing than helpful.