2. I have a Mavic Air plus a few smaller drones. I'm extremely aware that I can push this thing to 65km/h and do some solid damage, either maliciously, but much much more likely carelessly
3. I have lent several drones to several intelligent, typically safe friends, either under my supervision or alone in a field. Universally they pushed them too hard too fast and lost control quickly. [I don't care if you're going to say "but that's not me". a) Every one of my friends said that, and b) how is anybody else to trust that _your_ claim specifically is truthful? Prove it.]
4. The more intelligent the drone, unfortunately the more likely the person is to underestimate its danger because "these things fly themselves" and "it has collision avoidance". My nerd friends have started using them like Tesla's autopilot - perfectly safe and awesome until the very moment it isn't, at which point it's too late if you don't have your hands actively on controls.
So as much as it'll HUUUUUGELY inconvenience me, I fully understand that if I need to register and license my car, motorcycle, boat, plane, etc... I need to register and license my other fast-moving piece of dangerous machinery.