I think the point of that training is to be able to sweep even someone who is resisting the sweep (and knows how). It's counter to my approach and training, but I see that philosophy in a lot of the comments John shares from his instructor(s). And there's a certain brute elegance to it.I definitely wouldn't use something like that. My entire perspective on sweeps is that it's not a brute strength technique. Sweeps take advantage of the opponent's weak root and imbalance. Better time would be spent to learning how to recognize when this exists and developing the timing.
If you want to develop ability then you have to do so with a training partner. If you just want to be able to do the movement then you can train that on your own through drills, but it won't be enough to know how to apply it.