Well that’s great until you want more torque (with the long side of the handle) or you’re working in a space where only the short side fits in where the screw is, or you want to attach said bit to a drill. It’s pretty common for bit-sets to just have ordinary (straight) hex bits rather than the rounded ones.
Why would it be a separate bit? Most people I know just have a set of these
Well that’s great until you want more torque (with the long side of the handle) or you’re working in a space where only the short side fits in where the screw is, or you want to attach said bit to a drill. It’s pretty common for bit-sets to just have ordinary (straight) hex bits rather than the rounded ones.