I don't see people becoming embarrassed by rails on their guns. I have a few that have unused rails and I'm perfectly content with them. It may happen that someone invents something down the road that I will want to put on that rail. I certaily will not be paying someone to grind it off.
Yes, mounted lights are a relatively new concept. This does not make them a bad thing. You can still carry a light in your pocket for "normal" use and reserve the light on the gun for when your other hand is occupied. If you can see in the dark, more power to you. I can in some cases and not in others. I'm pretty sure that's why the torch was invented in the first place.