Agreed. Maybe something comes up with it later that makes sense to keep as a separate building. At the beginning it seems like it should just be part of the hub. Even if it's not part of the crafting bench but just its own other thing at the hub.
Again, maybe it makes sense later, but those first miners I'm not expecting to have to go there after the first one the game leads me to build with the tutorial. This small miner I have to produce at a building but an entire building can be produced without anything else but a handheld device. It feels like I should craft drill bits at the crafting station and then build a tiny building that has the drill bit as part of the recipe.