I'm not going to blame the world's largest desktop operating system, primarily used by the least technical users, for optimizing security over developer ease-of-use.
Besides, this is a false dichotomy - On your own comp you can self-sign the driver cert! The CA just has to be in a driver trust store.
The only people who lose out are those trying to distribute drivers to computers they have no control over and who cannot convince the user to install a certificate.
