This may be part of the reason why the Whitney Museum of American Art’s terraces face inward, toward the city — the garbage trucks and sheds on Gansevoort Peninsula. The trucks will soon relocate to Spring St. and the peninsula is slated to become a park, but there will also be a marine waste-transfer station for recyclable garbage. “America Is Hard To See” is the name of the Whitney’s opening show. But, well, Gansevoort right now is hard to even look at.