No... but if you're serious about something that CAN be harmful if mistreated, you need some form of regulation. You can be serious about things you like you know. It's not about NEEDING necessarily, but it's about taking it seriously. So long as you can just pay your £700 and fly a DJI Phantom, you're going to have people who treat it like a toy with no thought about consequences. If you have to pass a test and obtain a license, you'll reconsider how serious you are about it. It has the capability of causing damage and injury if misused, so it shouldn't not be something you can just buy, and use with no regulation.
I don't NEED to operate ham radio equipment - I enjoy it. It's not my job or anything, but it has the capability of causing a great deal of problems if I didn't know what I was doing, so it's regulated. I had to pass a stringent exam that included RF theory, electronics, radio licensing regulations, and even a morse code test to see if I can send and receive at 12wpm minimum. You think someone who just thought it would be a giggle would have done all that? They can just buy a CB or PMR if they want, as that is deregulated. The serious stuff is regulated because of the frequencies and power levels available.
With drones... those that couldn't be arsed doing all that, probably want one because it just looks like a giggle. That's not something that sounds like a good idea to me... people using them to have a bit of fun only. There are just too many idiots for these things to be unregulated if you ask me.