Also, if there are only grayscale photos of you, you were probably born before 1900, and all your friends or your children (who might want to colorize your photo) are probably dead, too.
It's a very strange argument to make: there exist some photos therefore other photos may not be colorized!
Seeing that a "neat tool" exists and using that "neat tool" are two diffrent things. Google Glass was neat, too.
But today, only 1% of people has black-and-white childhood photos. I just makes me want to argue when people pretend that it is still needed as much as in 1995 :D
I was also arguing with my friends about buying laptops with an optical drive ten years ago :D
Just because you don't want to use a tool, it doesn't mean others also won't.