"Why were people so intolerant of de Broglie’s gropings and of Bohm? For twenty-five years people were saying that hidden-variable theories were impossible. After Bohm did it, some of the same people said that now it was trivial. They did a fantastic somersault. First they convinced themselves, in all sorts of ways, that it couldn’t be done. And then it becomes ‘trivial.’ I think Einstein thought that Bohm’s model was too glib—too simple. I think he was looking for a much more profound rediscovery of quantum phenomena. The idea that you could just add a few variables and the whole thing [quantum mechanics] would remain unchanged apart from the interpretation, which was a kind of trivial addition to ordinary quantum mechanics, must have been a disappointment to him. I can understand that—to see that that is all you need to do to make a hidden-variable theory. I am sure that Einstein, and most other people, would have liked to have seen some big principle emerging, like the principle of relativity, or the principle of the conservation of energy. In Bohm’s model one did not see anything like that."
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John S. Bell, quoted in Jeremy Bernstein, Quantum Profiles (1991), "John Stewart Bell: Quantum Engineer"
https://en.wikiquote.org/wiki/De_Broglie%E2%80%93Bohm_theory
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De Broglie–Bohm theory
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