Scientists do NOT find what they expect. Scientists are looking for the truth.
There happened to be an experiment a while back when scientists were trying to find the 'Ether'. They were all pretty convinced the Ether must exist. However, in order to proof that theory, they conceived an experiment (Michelson-Morley experiment). To the big surprises of everyone, they did NOT find the Ether.
So, the scientists had to overthink they're view from the world, and they all accepted the truth that the Ether does not exist.
So the statement from James Randi is incorrect. Scientists are looking for the truth, whatever this might be!