I know you're trying to be cute, but if you click through to the index it's a lot more than just noise. Most of the generators are specific environments, ambient music, experimental.
> What about...removing said headphones and listening to the life around you? And even better, open the window?
Because I'm trying to work and the life around me is too distracting. Because my noise-cancelling headphones aren't blocking voices. Because baby is trying to settle down and "white-ish" noise helps. Because I have a headache or an ear infection and this one frequency band feels good.
Noise cancelling headphones still have a residual noise, that you will hear, because our hearing has an incredible dynamic range. Adding a faint background noise of your choice, to cover that residual noise, is a good idea.
Then, these crafted noises do exist because of the exact nature of the life around you. For many people, the "life around you" is what they want to escape, exactly.
What about...removing said headphones and listening to the life around you? And even better, open the window?