In that light, yes. But, I'm not certian that's what others were saying, as grappling as a "teaching aide". Seems like many were stating grappling as a WC/WT supplement to add to your self-defense tactics.
I love to cross train, so my replies probably sounded like I was suggesting adding a grappling art to your base art. However, I understand some don't like to crosstrain, and thats fine, so at the least, taking a look at a grappling art, again it could be anything...Judo, Sambo, BJJ, Wrestling...anything, see how they address a particular situation, compare that to how your base art addresses it, and see if anything can be added from the grappling art. If it can, great, if it can't thats ok too.