I think licensing is a positive to restrict the people who are safe a serious about what they do. Understanding airspace should be essential. But a pilots license? I want to fly a UAV. I don't want to fly a plane.
The current rules are a temporary way to allow people to fly commercially. They are designed within the limits of the current regulatory framework and this is big reason for PPL part. Remember, until the exemption process was put into full swing, we had 0 ways to fly commercially.
It's just a temporary scheme until they study, evaluate, debate, the issue and a lot of bureaucrats and politicians agree on the "real" rules - that will probably have to be passed by Congress. This sort of stuff takes a few years. Aviation is not like an Obamacare website. Once implemented, it is expected to work flawlessly from day one and be flexible enough to adjust and incorporate drone technology we can't even image right now.