I've answered previously, but I will restate.Then we are in disagreement on this point. But I'd ask how much research you've done on 'the other side' if any.
About eight months or so of Tangsudo at the recreational department through TKA and about four years during the school year only; totals out to about three, of Shotokan in high school by one of the teachers there. No dan grade. Aside from that reading up on the subject.