On the other hand this is about 0.1 sqkm of lunar surface stripped and processed. This feels like a pretty small quarry mine on earth. Given that, it feels like it would probably be worth shipping the materials one would need to operate a quarry plus build the ISRU as without material environmental concerns you could process considerably more in a sustainable fashion than shipping elements from earth. The ISRU could extract all sorts of other useful materials -

Oxygen

Silicon (can be used to make plastics)

Iron

Aluminum

Magnesium

Sodium

Potassium

Phosphorus

Etc

Power would be abundant to fuel the reactions via solar radiation. So I wouldn’t write it off, I think regolith processing would be foundational for establishing any meaningful presence. Likely it can be entirely automated as well.