The moon doesn't smell like anything. There's no oxygen there, so there's nothing to smell. Do you really think the only reason that you don't know the moon doesn't smell like apple pie is because you or someone you trust hasn't been there yet?
Again, to make comments like the bolded is basically saying that we cannot know anything about the world we live in, ourselves as a species, and our place in the universe.
I'm happy to draw that out and explain further. But we must be able to rely on reliable information from reliable sources. You say you're skeptical, and I was a philosophy major so I'm aware that there are different schools and models of skepticism, and different skeptics identify differently, and some really do basically put their head in the sand and just pretend that the only world that can know about is the 6 inches in front of their face. If you're one of those kinds of skeptics, I doubt there's anything I can say to sway you.
Pyrrho came to the conclusion that nothing can be known for certain. If you're into Pyrrhonism/Fallibilism, or right next door, then I'll stop while I'm ahead and I'm sorry for wasting your time.