Amateur Music Matters
UK-based group Making Music has shown that making music has real, measurable, tangible positive effects on individuals, on their community and on the local economy.
Even if the UK numbers in the report don't apply to us, its principles and conclusions do. We find this a beautifully succinct and clear statement about why groups like ours matter:
https://www.makingmusic.org.uk/resource/why-amateur-music-making-matters