To be fair, motorcycle helmets use the same technology as bicycle helmets do: EPS foam that crushes and breaks in a crash, rather than sending the kinetic energy straight into your skull and brain. Motorcycle helmets have a bit more EPS foam, cover more area, and have heavier shells, because you don't have to worry as much about ventilation on a motorcycle as you do on a bicycle, and weight is really important when you're on a bicycle. While there are a small handful of full-face bicycle helmets, they aren't very reasonable for most people that are commuting.

And yeah, if you're on a bicycle, please stop at red lights, and at least look before rolling through stop signs.