It seems this request always comes from people who grew to appreciate this feature when using a different product. And those products didn't do everything Apple's way, either. It's kind of like telling your second spouse, "I sure wish you were more like my first spouse."
I bet if the question was, "Who would like to have an LED flash for the front camera as well as the back camera?" you'd have more takers. Who would object to better-quality selfies? (Rhetorical question - no cries of "Vanity!") And just as the back camera flash can also be used as a flashlight, folks could have the option to use the front camera flash for notifications.
In short, if one component can serve several purposes, then more people will find it useful.