No, mine climb because they like to. I've only had them 2 years, but I have a dozen of them. If you put them on a bookshelf, some will go up, and some will go down. They don't always go the same way every time, but the same snakes will tend to climb up time after time. And I have one or two that are actually surprisingly good at it.
And the one time I had a mass escape (the lock on my Black Sand tank was broken, and the black pastel girl figured out how to slide open the screen) they all did exactly what they usually do: The black pastel climbed the buffet in the other room and went cruising through our booze collection, and my 2007 girl who likes to climb ABSOLUTELY EVERYTHING actually climbed out of her tank, CLIMBED THE STAIRS, and then started climbing bookshelves up there.
And my pied female, who's competing for the World's Laziest Snake, stayed in her hide the whole time.