Wether it is or not a platitude is irrelevant, it doesn't devalue the advise. It is good advise to tell somebody that it is better to be safe than sorry not to

Wether it is or not a platitude is irrelevant, it doesn't devalue the advise. It is good advise to tell somebody that it is better to be safe than sorry not to use an illegal substance especially if doing so can land you in jail.