For the sake of argument and illustration I will presume that certain articles of ordinary diet, however beneficial in youth, are prejudicial in advanced life, like beans to a horse, whose common ordinary food is hay and corn.
“Being in a multicultural environment in childhood is going to give you intuition, reflexes and instincts. You may acquire basic responsiveness later on, but it's never going to be as spontaneous as when you have been bathing in this environment during childhood.”