Imagine mandatory certifications for anyone who takes the helm of a boat. There would be a lot of screaming.
Already in place in Canada.. it's not onerous, and not particularly qualifying, but everyone, youngsters included, need to have a PCOP (Pleasure Craft Operators Card) for any powered vessel - including your 7 foot tender with a 2 hp outboard. It was phased in over a period of time, and was issued to anyone who had ever taken, or takes, the Canadian Power and Sail Squadron basic boating course as well as being offered separately, even on-line.
Fees are reasonable and there's been little hue and cry, though I imagine there are a lot of crusty oldtimers still boating without it....