It doesn't show all of the kinds. Not all kinds have a merged NIP.
Discussion
Most new kinds going forward will not have a NIP in the NIP repo.
People need to adjust to the new reality that they can't manage 5 gazillion NIPs and many future NIPs will be for use cases that the repo owners can't understand or evaluate.
Let it go. Move on.
An open protocol doesn't need a Central Committee to run it.

Yep. There’s NIPs for core functionality, then there’s everything else
Yeah, things like npubs/nsec, how to define a relay, how to structure a note, how to delete a note, etc. made sense in a centralized place.
Trying to explain to some Twitter-clone devs why I need some particular NIP for transmitting EU export papers, to cover them with transport insurance for dangerous goods in flight...
Not gonna happen.