Teenagers often think they know everything, and are invulnerable to maladies. Self denial is a strong emotion.
But if a person is 60, looking back to their teenager years through rose colored glasses can seem very nice.
The same with those who look upon the 1950's as a most wonderful decade. It sure wasn't for most who grew up in that decade, but TV shows like Ozzie and Harriet, etc., made it seem so simple and easy.