Moon Mining coming to highsec was always a very confusing choice from CCP. New ore sources in HS wasn’t something that anyone appeared to be clamoring for, and the NS ores existing in complete safety in 15% variety seemed like a slap in the face to mining in NS.
Wormholes losing their moons was an odd side effect, as wormholers having at least a small source of ore for limited local production doesn’t appear to run any real risk of seriously impacting markets. That is probably the most relevant place that needs highlighting as an oversight from CCP when it comes to this change.
With the current balances of moon minerals, R4s will never be worth mining compared to even basic belt mining. That said, CCP has said that they plan to modify the recipes to balance out of the oversupply of R4 compared to other moon goos, so until that change is complete and they return asteroid belts to a state of being mineable at scale, there’s not going to be much point to discussing the matter.