And then there are the unknown unknowns. We spend a lot of time prospecting earth, and haven't spent all that much prospecting the moon. This will be much easier with boots on the ground. And while the moon's lack of geological activity means it isn't good at concentrating resources, it also means remains from impact events remain much more reachable and concentrated than on earth.
1: https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2019GL08...
We don't, though.
(Not for lack I am sure, and, as mentioned, of comparable as-of-now secret comparable sites already known about ...
... but because public knowledge of at least this one makes for vox populi pressure uoon spacefaring actors.-
And speaking of races on the moon: https://www.cbc.ca/radio/quirks/moon-walls-running-1.7192281
Now how do we know there isn’t anyone there already… ;)