Science? Really?

That Horizon programme about Pluto (a recent repeat) is a strange affair. It starts with the assumption that astronomers knew everything about the planet on the basis of images a few pixels big and some bigger guesses.
    So why would anyone be surprised by the pictures sent back by the New Horizons probe of a planet we’ve never seen properly?
    It makes as much sense as someone in a backwater village in England assuming they know everything about China without going there or meeting anyone Chinese.