True, but misleading. There are practical blocks to children drinking alcohol: they can't buy it from shops or bars. In the UK, you can buy it from 18, and you can consume it in a pub/restaurant from 16 but only with a meal and supervised by an adult. In France, you can buy it in bars from 16.

An analogy would be that social media consumed by children is surely less harmful when it's a parent holding their own phone towards a child to show them a few selected photos from their Instagram feed. I doubt most people would object to that, even those that want to ban social media from children.