There is also a large community of builders and flyers [1], a network of clubs with actual airfields for the purpose, and a multi-million dollar insurance policy with membership.
Both the difficulty, the investment, and the training and peer pressure drastically reduces the number of participants who behave like asshats with their aircraft - to essentially zero.
With hobby drones, it is exactly the opposite -- just go buy some overgrown toy, and you can now put up in the air a device that with any of hundreds of failures of the device or pilot, can become a lethal projectile falling from the sky.
So, yes, serious requirements for anything over a few hundred grams is very reasonable[2].
[1] Academy of Model Aeronautics -- www.modelaircraft.org
[2](no, I'm not implying that the Govt automatically implements every reg in a reasonable & effective way, that could still end badly.)
[Edit: footnotes]
drones will eventually become so heavily licensed than anything outside of law enforcement, large news organizations, and politicians, will be restricted to the point of needing specialized parks just to enjoy them.
RC planes generally fall under 112-95 Section 336 which pretty much should work for drones