I used to ride flat bars only until I was well into my forties. Then I was bought a bike (tourer) and it had drops. It took me about a month to feel confident and now I would not go back to flat bars out of choice. Why? Drops just give a greater range of positions where you can rest your hands, so they are much more comfortable. This is a great advantage, particularly on a longer ride. Some folk seem to think that if you've got drop bars on a bike, you ride on the drops all the time and you don't. But you do have a greater range of potential hand holds and that is entirely positive.
Of course, for pure comfort, one has one's mobile deck chair where the steering is so light, one can control the thing with one finger of one hand... my IceT recumbent trike!