Re: What is what with Scott Sonnon's material?
Why go against them? Because they may be wrong. And notice what you've written, that you stopped because of time constraints. That isn't at ALL the same thing as arguing that the two are actively incompatible.
Coaches used to say that weightlifting was terrible for athletes in all kinds of sports. Weight training would harm your flexibility---wrong, if anything, weight training enhances flexibility. Weight training would slow you down--wrong, it doesn't slow you down. It protects from injury and can enhance your athletic performance, generally (I'm not talking about internal arts). The muscle-bound notion was, and is, a myth.
And now, back to specificity. One of the main findings of research on motor control and learning is that there is very little evidence for one skill actively interfering with another. This is so much the case that getting twice as strong in the squat doesn't translate into being able to jump twice at high, and those are two skills that share a lot in common (at least at the start).
So you're telling me that building local strength with a few exercises done at most 3 hours a week radically interferes with development of internal strength over and above the typical difficulty?
I don't think weight training HELPS internal strength (except perhaps for strengthening the legs, the prime movers), but I still don't buy that it hurts, except in the sense that doing ANYTHING else when you could be training internal strength is bad. OK, I buy that. But beyond that? How?