it doesn't say that at all.
it said that good drivers SOMETIMES miss their exits.
it did not say ALL good drivers miss their exits. it did not even say that ALL good drivers sometimes miss their exits. it said that there are times where good drivers miss their exit. there's no imperative.
even if you want to be the most pedantic person on this autism boat of a website; in this case you're just plane wrong.
no they actually do explicitly say that in the show.
it's in drum island. it's roughly what the old doctor told chopper it meant and then luffy agreed.