This is an example of a theoretical CAD model that never should have been produced. So many reason this is terrible, but one that I haven't seen in the comments yet is that an important part of a bike working, is that chain is stretchy. Yes, chains stretch, not a lot, but a little. When you put force down on the pedal, the chain acts as a very strong spring. This spring buffer between pedal and wheel is the thing preventing you from snapping off sprocket teeth when you suddenly start or stop applying pedal force.

This bike not only lacks this, but has weaker teeth. So yes, the friction is lower, but you're going to end up with a dozen missing sprocket teeth and a few exploded bearings in a couple weeks of riding this.