Are you really suggesting that people can't have second or even third careers?
A 40-year-old who got into web design after a lengthy career in print media design, if not some totally unrelated field, is often no more experienced than a 20-year-old who got directly into web design. I know this can be true, because I've worked with both types of people in the past.
> "hipsters" in their 40s and 50s
These statements cancel each other out, so there's no reason to state either as supposedly providing information content.