Any Bethesda game is essentially a mod vehicle with an RPG tacked on anyway. I think it's entirely on brand that they didn't go all in on hard sci fi for vanilla. I don't think that's incompatible with having a lot of planets that are mostly barren filler; I'm never going to explore 1000 detailed planets, and rescuing someone from a crash on a barren moon or finding a smuggler base on a frozen rock helps to keep the more interesting places feeling cool. There are still more interesting planets than I'm likely to ever get through.