I can tell you why for most of them. They are in the "as fast as I can get" crowd and they think since they are fairly flat out to 50 yards that it's a good idea shoot at 50+. With those light little rigs, they don't have the energy to penetrate worth a hoot. That and a lot of them are using junk broadheads because that's who is sponsoring them. My current BowTech gives me right at 300fps with some fairly heavy arrows. At least heavy by today's standards in compounds. If that rig won't zip through the biggest of whitetails at 40 yards, then I missed and hit solid shoulder joint. Even then, it would probably get through both shoulders but I don't know if the arrow would completely get through.