I had a red keyboard and I never felt that it was necessary. But then I got a blue and I would never go back. Just because the sound isn't necessary or helpful doesn't mean it's pleasing to have it.
Like a big moon roof in a car, if you've never had one you may not really see the point, but once you get one the feeling of having light coming in from overhead is something that you quickly begin to enjoy.
You may want to try this program - even though I have blues I keep it enabled when I use headphones or when I am using the laptop keyboard: https://github.com/zevv/bucklespring
