I'm not sure if the phrase itself is novel. The idea of having good taste in problems is certainly not; and is very useful -- Richard Hamming (cited by Sam Altman) spends a great deal of time talking about how to choose problems [1].
The basic idea is that you need to work on an important problem. But an important problem isn't what you think (e.g. time-travel, teleportation, antigravity, etc.) -- instead it is a problem for which there exists an "attack".
The basic idea is that you need to work on an important problem. But an important problem isn't what you think (e.g. time-travel, teleportation, antigravity, etc.) -- instead it is a problem for which there exists an "attack".
[1] http://www.paulgraham.com/hamming.html