It certainly is not here in Austria. 17 year olds drinking beer between their late afternoon classes is not unheard of and often tolerated.
Well, it's between classes, in their free time.
Don't know, seems natural to me, since I've grown up with that mindset but not all nations agree on that.
I don't get some countries or people that forbid alcohol until you are 18 or 21. I drank beer when I was 8 and got totally drunk at 14. Which was a good thing, because it was at home and, well, lesson learned. Starting with alcohol when going out at 18 or 21 sounds much more dangerous.
Social pressure/not yet fully formed brain etc. leads to ppl under 21 being more likely to drive drunk. That's the rationale for not being able to drink until 21.
"The National Highway Traffic Safety Administration (NHTSA) estimates that minimum drinking age laws have saved more than 31,000 lives from 1975 to 2017"
https://injuryfacts.nsc.org/motor-vehicle/motor-vehicle-safe...
In other countries you will probably be drunk for the first time around the time you're taking driving lessons, or earlier.
They tested it out and the test was successful. The kids preferred beer to sugary drinks. The beer was much weaker than what adults are accustomed to at 1.5% to 2% alcohol.
Otherwise, you are right. The main ban (children under the age of 14) was in 1956, or 67 years ago.