It never ceases to amaze me how demanding/ignorant the pinside hive mind is.
"Why can't they just add more songs to $bandpin? It would be so easy."
Because every one of those songs is an asset, costs money, and was already negotiated before you even heard about the pin.
There might be legal reasons. Maybe a former or departed band member holds rights to a specific song, and doesn't want it in pinball.
Be happy with what you got.