Why shouldn’t aliens look like us?

“There are good scientific reasons to believe that extraterrestrial life forms might resemble human beings.

…Since the Copernican revolution in the 16th century, indicating that the Earth is not the centre of the universe, we have been conditioned to reject the anthropocentric viewpoint. In interpreting observations, scientists try to exclude human values. But we shouldn’t be afraid of imagining the simplest solution: that ET might be just like us.” (Guardian.UK)