Oh, good point! Wouldn't necessarily help ELWs though.... it also shows that Planetary Influence Yes/No? must be a flag somewhere in station or economy type settings that maybe could be exposed to the system architect without too much trouble.
Not really related to the thread topic, but no-bio, no-volcanism, high metal content or metal rich worlds work pretty well too, as extraction doesn't consume any important refinery products. Refinery consumes most of the extraction products but we didn't care about themRight now if you don't have a no-bio, no-volcanism rocky body in your system the only viable way to get at least the three main metals (Al, Ti, steel) is to build a High Tech surface outpost and a refinery hub because High Tech seems to be less antagonistic to Refinery than Industrial and Terraforming.