Presumably the reason to allow this is not to permit hams more freedom, but rather to persuade hams to purchase encryption units so that when the authorities ask them to provide communications they can do so in an encrypted way. Or, for the lobbyists, to make the ham radio service appear to have more utility in handling emergencies.
I can't think of any reason why encrypting ham communications would do anything to improve the hobby, but I can see why authorities might like to have access to another somewhat secure communications alternative. How secure could it be anyway, you still have to distribute the keys ?
The best this would do would be to make it slightly harder to listen to.
I'm a new ham, looking into installing an antenna in my back yard. I have kids.
The impedance at the center of a half wave dipole is low, say 70 ohms or so if it's the right length for the transmission, but at the ends it is really high. 100W (small beer for a ham operator) into 70 ohms is 80 volts or so in the middle of the antenna. At the end of the antenna the impedance is very high, say 4000 ohms, the same 100W is then 630 volts or so.
The impedance can be much more, the power can be much, much more, these are moderate numbers for RF that can be generated from a small radio. That's one of the reasons the antennas are hoisted into the trees, it's not just for propagation.
So a, presumably, leading scientist balked at doing some research work for, presumably, sound technical and professional reasons, but all it took was the prospect of winning $100 to persuade her otherwise.
This field needs to pay more!