Kuhn did not say that. His notion of paradigm advancement had a lot to do with a lot of other things. His canonical example of paradigm change (the Copernican revolution) had people actively changing their minds even in his narrative. And there are a lot of problems with his story of how things went, see for example this essay.
Furthermore, in many other shifts where new theories came into play, the overall trend happened with many old people accepting the new theory. Thus for example, Einstein's special relativity was accepted by many older physicists.
...While Einstein himself rejected quantum mechanics!
(And, yes, I'm aware of the philosophical glitches in the Copenhagen Interpretation. But Einstein refused to accept QM on principle, and I'm not sure any evidence could have convinced him, which is rather poor form for one of the greatest thinkers of all time.)
Every month on the month, Less Wrong has a thread where we post Deep Wisdom from the Masters. I saw that nobody did this yet for December for some reason, so I figured I could do it myself.
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