Marketing is the delicate art of convincing people they need something they would never have heard of, until you told them they needed it.
When someone tells you of something you "must have" by a certain age, you are being marketed to.
When you are being marketed to, someone is trying to reach into your wallet. If not your monetary wallet, maybe your political or spiritual one. Remember this: nothing you can sign over to them will ever fill their abyss. So consider only the benefit to you.
For another view of that, check out the march of time as Gemma Correll details things women "must have" by the age of thirty.
BTW I disagree about the last item for the 1950's. Vodka served many, just as well.