The same? No, obviously not. If you have a specific point you’re asking about, I think you should explain it. or else this question can be answered in many unrelated ways. Adding “drunk driver” confuses and dulls the comparison. Drunk drivers are dangerous but they often don’t kill anyone, aren’t trying to, etc. I’m not sure why someone would compare drunk driving to intentional mass shooting. In general, and considering intentional killing, a competent person could kill quite a few more people more easily and more selectively using guns than they can using a car.