Different instruments have different cultures, don't they? Violins, cellos and flutes and other orchestral instruments are usually introduced to the child by the parent. The parent then anxiously frets and worries about finding a decent academic teacher in the same way they worried about finding a good school.
An involment with Guitars and drums tend to be prompted by a more complex peer group/ social situation, not by parents...unless you've got a modern, guardian reading parent that insists on taking the whole family to Glastonbury every year. The cult of amateurism is preserved and you get Scouting for Girls.