[fastball]

Most of these categories aren't 'hidden'.

If you select one of the main genres on Netflix, almost all of them will then have a "sub-genre" picker which, as far as I can tell, includes most if not all of these.

Sure, this site lets you see them all at once without having to choose a parent genre first, but it doesn't seem like that big of deal.

[paxtonab]

It is easier to browse this list than it is to browse a Netflix genre...