[craftinator]

I think some of this falls into the simulation paradox: the more accurate the simulation, the closer the simulation is to the thing being modelled. But it's a quadratic relationship in most cases, so at some point meaningful increases in simulation accuracy cease to be economically viable.

[dharmab]

Yeah, but in the words of RyanF9, "The US government can afford a BB gun", so there's no reason that DOT can't test helmet visors.

The main reason the DOT standard is so bad is because its mired in bureaucracy and managed by a severely underfunded organization.