It is always about choices.
ArcoLinux runs in 2021 on Pulseaudio. Alci has no sound at all. Why not give Carli pipewire?
In order to enjoy music I like to have my bluetooth headset available so we explain how to add services.
It could be any other service like printing, avahi, ... The workflow is the same.
See what happens to the content of your /etc/systemd/system if you enable the service and put the same files on your iso (airootfs).