Where did you here that in no form of Aikido do practitioners grapple or strike? That is inaccurate. I happen to have practiced one or two things in my short life(see profile) and can tell you that Aikido can be integrated into real fights just as any other art. Not all Aikidoka believe that Aikido is the one and only, just like you´d likely take a severe beating from a friend and me if you used only BJJ. At a high enough level, perhaps Aikido can be considered complete because what you see happen in NHB would theoretically not happen were you skilled enough in Aikido, at least not in the way featured on TV. Your joints move the same direction no matter what "style" you´re in. Therefore you could use Aikido from the floor, standing, sitting, or otherwise. Maybe you shouldn´t judge a book by it´s cover.
My two bits.
At your service,