The whole GA system is broken, Medicals are just one part. Everything below 4 tons in day VMC by VFR should have rule sets as easy as driving a car. Add extra medical conditions if you intend to do aeros, fly in cloud or at night or something else subject to more effects on the body. This whole idea that a Warrior or 172 is somehow more dangerous than LSAs because of a weight that is less than the average car makes little sense. And yeah I can drive up to a 4 ton truck or even bus on a normal licence and do whatever I want. With little extra training be driving unlimited weight non articulated trucks and buses on just about any public road and, weight and DG limits aside.