It's quite the other way around. That's what the early hippies looked like. When older people yelled 'cut your hair', people who looked like the guy in the poster were who they were yelling at.

Somewhere on the web there's a collection of some artist's B&W photogaphs of San Francisco hippies during the early-to-mid 60s when young people began flocking there. This is pre-Jefferson-Airplane SF, when the cool band was the Charlatans and the aesthetic was 19th century retro. People dressed up in ornate Victorian and/or cowboy clothes and looked like what we now call hipsters. There were radical street theater groups like the Diggers and whatnot. (There's a good article about this period here: https://www.vanityfair.com/culture/2012/07/lsd-drugs-summer-..., posted to zero effect by yours truly in 2012: https://news.ycombinator.com/item?id=4123525).

Anyhow, there are tons of pictures in that collection of kids in sleeping bags, or playing guitar, or sitting on the floor of apartments in the Haight. Everyone's hair is short by later standards, looking much like the guy in the poster. The apartments look the same as they do now, except with less furniture. It's a brilliant collection. I wish I could see it again, but it's lost in the sands of my memory, and of course Googling for hippie photos just brings up layers of dreck.

"The word hippie came from hipster and was initially used to describe beatniks who had moved into New York City's Greenwich Village and San Francisco's Haight-Ashbury district."

You mean, how the standards have been appropriated by the mass culture behemoths trying to simplify history into easily digestible ad ridden programs.

No, AnimalMuppet, the article explains that he's a "yippie" very clearly.

https://en.wikipedia.org/wiki/Yippie

If you think the definition of "hippie" is exclusively about hair, you've got some reading to do.