You can do anything but nobody can do everything. I have dropped hobbys mostly because other interests have crowded them out. Some people get a new motorcycle and suddenly you don't see them at the flying field much anymore.
The competative versions of this hobby, pylon racing, pattern, scale, can burn people out. At first you can't wait until the next event, then the next event comes at you before you are ready, and finally, you kind of start looking forward to the "free" weekends where you don't have to travel to some contest. Then you start missing more and more contests and finally just drop the activity and don't miss it.