Funny you bring this to the conversation...
I know where you come from: there's some precedents over how obvious assumptions turned into ED Yet apart from the Horizon/Odyssey playerbase mixing I don't get how can be concluded that "no spacelegs on airless" is to be feared.
I mentioned SC because since the Odyssey was annouced, people are constantly comparing the two. I'd never hear about Star Citizen otherwise.
And I didn't say the problem was in playerbase mixing (because, like I said before, people on airless planets would basically play Horizons, NOT Odyssey) but in making old planets suitable for on-foot exploration. For example overhaul of old settlements. That's a lot of work I imagine and maybe FDev wants to focus on new planets.