Excellent points, Jim.
One of the main problems you have defending your point of view is grappling, on the ground, is mainly concerned with positional dominance to effect a submission,
this can't be transmitted in solo kata, it has to be done with a partner, and no line of Okinawan Karate, that I have ever seen or heard about does train, in this manner with this in mind.
but the [edit:karate] strategy is NOT to go to ground or be taken to ground to try for positional dominance
"In case you ever wondered what it's like to be knocked out, it's like waking up from a nightmare only to discover it wasn't a dream." -Forrest Griffin