Wouldn't a regular ballistic helmet also protect the wearer from "bumps and scrapes"? Or even if it didn't then why not redesign one that had the ergonomics of one of these sports helmets, but also could stop a bullet? Hmn, I guess the cost of manufacturing one, but I'm curious why run of the mill helmets were seen as disadvantaged in that area compared to these (...though presumably a bit more effort goes into make those sports ones comfortable).