I agree with you and they are taught to do that as well as turn your opponent as kids, but that’s easier in slow mo or at a stoppage than when guys are moving at pace. And quite often you have to tackle your opponent all the way to the ground to get a free, you can’t always just stop at knee height or let them go. Actually paying frees for incorrect disposal before that can help.
You could do what you say, drop and pull your opponent down, but depending on the movement before the tackle and the momentum, still end up with them hitting their head. It’s not foolproof.
It goes back to what you said about the current interpretations, but it still is a contact sport and that kind of thing is usually incidental, you can generally tell when there is genuine intent and malice. For mine the changes are for the worse as a sport.