I don't consider it gatekeeping. I consider it responsibility. Low barrier to entry is not always such a good thing. The idiots that would not get into it because of some sort of required training but would get into it without hesitation without training are typically ones that cause the problems for everyone else. There are lots of things in life/society that requires some sort of responsibility. I feel that something you can fly in a manner that you can only see in one direction without fully knowing what else is around you is one of those things. Caveat being designated areas setup and maintained as a UAV operating area.