How would I convince a school district of the importance of fifth grade music education (see details)?

Long story:

Recently, I have noticed that one of my past schools has pretty much removed fifth grade band from their music education. It used to be a class that I took, but it was recently downgraded to an after-school program.

The fifth grade band program was again downgraded to a before-school program, meeting twice a week for twenty minutes. It takes a lot of time to put on a good concert, but when you add in the fact that these people probably hadn’t touched their instruments before, forty minutes a week is simply not enough time for a band to practice.

I just recently watched a video of their concert, and it was admittedly terrible (I can speak my true opinion here because I am anonymous). They played stuff such as Hot Cross Buns and Mary Had a Little Lamb and were extremely out of tune, even by beginning band standards.

The band was so small that it may not even meet the standard definition of a band. There were nine members in total: Five trumpets, one clarinet, three flutes.

I feel like the fifth grade band program is doing more harm than good. It damages the image of the rest of the district’s music education program (it was part of a school assembly, everyone at the school saw it). I feel that the terrible quality of the concert was not due to the students, or even the new part-time band conductor, but to the disproportionately small amount of energy and money the district as willing to put into the program.

I feel that fifth grade music education is important because it gives those kids a one-year head start before they go to middle school and the real band stuff begins (competitions and the like). Now, the sixth grade band is going to be the beginning band and everyone would have one less year of band experience. It also allows people to try out playing a musical instrument before the rest of the academics begin to take up too much time.

The main question is: How would I convince the school district of this?