Pep bands are far, far superior, but unfortunately not all schools (a) want a pep band, (b) have students who want to be in a pep band, (c) a pep band tradition to uphold, or (d) some combo of all three. Back in the day at my alma mater the students put together a pep band that played at all the home FB and BB games. We found the 50-60s era blazers and wore 'em at the games, too. It was great fun. The not-so-great BB team didn't lose a game we played at the entire season.
The next year, the administration directed the septugenarian band director to take over. They lasted one FB game before expiring due to lack of interest.
I salute the ASC schools who have actual marching bands and the SCAC schools that have real pep bands (including especially DPU and Rose-Hulman, sadly we're losing RHIT).