There are countless decent non assisted physiques out there who don't (they cannot or they would waste away) drop to 1000 cals/day.
To say naturals can't look good all year round is also utter bullshit. If by "good" someone means vascular, full, and shredded then of course not, but naturals can't look like that anyway. Sorry Layne, growing into a show when you're clean just doesn't happen.
The naturals who look good year round may not be stage big, but they can look plenty big in the right photos - definitely getbig big. They will just not have rounded off muscles other than in their strongest body parts.