I used to think the same exact thing. BUT, I'm really glad now that I took the course. I learned a lot about the airspace in which I'm flying and have a whole new respect for others who use it. I'll be taking my test this week.
One thing I didn't know is that there is a lot of commercial work being done with drones. It's possible that your real estate picture could lead to being asked to inspect a tower, power lines or a farmers field, for example, in a controlled airspace or within 5 miles of a Class G airport. Once you starting taking pics commercially, it could most definitely lead to more. You just never know and the FAA wants you to be prepared if that happens. I'm doing commercial work now for a town but my pics won't be used until after I get my certification. This work for the town, is taking pictures of a bridge replacement for their upcoming Town Report. I'm using both my land camera Canon 6D and my M2P drone.
Anyway, that's my two pennies. Have a great day Super Dave!
One of the best and most comprehensive replies about this topic I've seen in a good while. Thanks for adding reason to the conversation.