QUOTING:
Richard Feynman famously said, "I think I can safely say that
nobody understands quantum mechanics." Since Feynman won
certainly understood how to use it. Indeed, quantum mechanics
(QM) "has survived all tests" and "we all know how to use it
and apply it to problems," yet Murray Gell-Mann (who also won
a Nobel Prize for his work in quantum theory) agreed with
Feynman, saying, "we have learned to live with the fact that
nobody can understand it."
cit--https://sciencex.com/news/2022-01-quantum-theorists-mechanics.html?