I have been flying drones for a few years, and although I don't do any commercial work I chose to get my Part 107 certification. I figure the more you know, the better off you are in any endeavor.
The points made by 6zfshdb are all accurate and insightful. And, like so many other things, there are too many cowboys out there who misuse drones and fly in an unsafe manner. Sometimes this is just due to lack of knowledge, but other times it is due to that Western mentality of 'this is my drone and no one is going to tell me what I can or can't do with it.' Unfortunately this small minority of unsafe users give drones a bad name in the view of the general public.
Probably the biggest upcoming issue with all drones is the FAA's current proposal for 'remote identification' of any vehicle within controlled airspace. And 'controlled airspace' covers the country, not just the areas over and around airports. Depending on how the FAA's proposals are implemented, ALL current drones may become obsolete (and illegal to fly) within 2-3 years. New drones may have to include hardware which allows them to squawk an I.D. to air traffic controllers, as is currently mandatory on manned aircraft, and there may be a necessity for drone pilots to, in essence, file a sort of flight plan for all drone flights.
These new rules could kill recreational drone flying, and all but the most critical commercial drone operations.
For information on this big wet blanket, you can check out the FAA's press release here:
https://www.faa.gov/news/press_releases/news_story.cfm?newsId=24534