[Gibbon1]

I mess with radio's at work. The there are two issues.

Often for testing one wants to check the radio operation outside the normal band or modes of operation. In my case, sweeping the radio across a really wide and band noting where the pll fails to lock. I'm going to really twitchy if I can test the pll at frequencies outside the band. Doing things like, turn off spreading and checking carrier and tx power. I'm sure more complicated radio's than I use have similar.

The second is what is legal varies depending on where the product is sold and used. So so a mode that's legal in one country is verboten in another.

In general though, I'd rather hate for the FCC to try and force manufacturers to lock people out. Because likely it won't work well and there is a definite cost to implementing secure boot. But then again the FCC is historically extremely hostile to the idea of ordinary people mucking with wireless. So this doesn't surprise me at all.