Again this has less to do with safety and more to do with corporations securing nearly ALL low altitude airspace for themselves. This will eventually effect civil aviation as well. Ultralights and powered parachutes do not have collision avoidance systems and barely show up on radar how are amazon delivery drones going to avoid colliding with them?
I believe jazzviper is quite close to the truth. (A little background, I'm a long time modeler and career FAA ATC with over 33 years service). IMHO, the RC community has two factors working against it's future.
(1) Electronic flight controller capabilities (fixed wing and heli/multirotor). GPS navigation and autonomous operation, available off the shelf, with open source support, at very low cost, which literally anyone can buy online from sources worldwide. The genie is out of the bottle, and there's no putting it back. The US "homeland security" powers-that-be recognize the risks this technology represents should it be used in a bad way, and are performing their duty in dealing with it.
(2) Big money lobbyists representing commercial "drone" interests have the government's attention, with the goal of the FAA granting them access to the National Airspace System, including operations below 400 AGL.
Unfortunately, the RC hobby community is just a drop in the bucket of the big picture, for both of these factors. A few thousand hobbyists in the US lose their hobby? "Well, I'm sorry, that's too bad..." is the response I expect we'll get from the feds. The best we can do is make phone calls and write letters, maybe we can get some scraps thrown to us.
I don't expect rocketry to suffer the same fate, at least not launches operating in conjunction with an activated altitude waiver. The low risk continued to be presented (no active guidance) and relatively limited impact to National Airspace System operations (relatively very small radius), I expect and would hope that "they will leave us alone".
Tony