HFY does have take down defenses (kius sau training covers this pretty well indepth supported with things like with CL, box and gate theory concepts, gravity , leverage, etc), but this is different than 'counter grappling' as a grappler would impy if that makes sense. And I am not foolish enough to think I can deny everyone from getting in my space and/or taking me down - but that is the goal
in theory
And if I get taken down, I agree, I better have a decent understanding of what can happen there if I have any decent chance of safely getting back up.