If you have (root) access to a router, what's to stop you from circumventing software blocks on higher channels / power settings? Don't try to enforce hardware

If you have (root) access to a router, what's to stop you from circumventing software blocks on higher channels / power settings? Don't try to enforce hardware behavior in software, especially if you're concerned with security. Instead, enforce limits on power and channels in the hardware itself. Of course, the FCC won't do that because it will cost manufacturers money on region customization. And screwing big companies is harder than screwing consumers.