anyone else notice?

I just finished watching The Music Man again & noticed that the men who were not older &/or cast as stars or character actors intended to have a comedic intent here, were primarily in their late teens or in their twenties.
That, I assume, was a matter of casting that called for the type of actor who was limber & possessed dancing skills for the many scenes that contained wonderful & strenuous choreography.
Timy Everett, who played the bad boy Tommy Djilis, was only in his mid-twenties at the time. Sadly Everett died of a heart attack in Manhattan in 1977 at a truly young age.
Watching the band strut & march, such as when they parade out of the high school and around the square near the end of the movie, you are given a great view of the marchers from within & above their formation. There is a lot of youth & lean ahtletic vigor evident in the ranks of the band. It wasn't just "boys" in a boys band.