There's no doubt that many people ride with too much weight in their stirrups. That's a common mistake. I grew up riding in both saddles and riding bareback and learned to apply bareback techniques to saddle riding. But to imply that the type of stirrup makes no difference to foot comfort .... no, I'm not going to buy that. And, there are relative differences to the amount of weight in the stirrup. Different situations will dictate that.