I guess that the illusion of safety is more important than real safety here. If there is a
separate subsystem with cryptographically signed data about emission levels, that makes it
feel less open, less unrestricted, even if you in fact can just edit the source code a bit to
bypass the whole thing. Kind of like how the anti virus people want deep kernel hooks for
their anti virus products, even though there is nothing they can do with those that can't be
done by a pure user space solution. Kind of like how it has been repeatedly demonstrated that
there are many simple ways to get various weapons past airport security, but regular people
aren't even allowed to bring a bottle of shampoo.
Sometime security theater is the only thing that matters.
The good thing about this proposed subsystem is that it will actually make it easier to write
law abiding, bug free and stable drivers since it's suddenly much less work to find out at
what power you're allowed to transmit on a given frequency. So it serves a dual purpose of
both giving an illusion of safety and making the life of driver writers easier.
And hey, anything that will get this stupid policy deamon for my Intel wireless of my system
is a win in my book.