Hi Sean, yes, that’s correct. The HiFiBerry image is a stand alone turnkey image. Just burn it onto a microSD and boot up the Pi; no Linux knowledge required. The downside is that you can’t log into it with a terminal and configure things, but you can access the FAT partition on the SD with a PC and configure WiFi (if required).
If you are thinking of a Linux install with Roon Bridge, rather than the HiFiBerry image, then checkout Rene’s DietPi guide. It is a very simple menu driven install but needs a keyboard and screen on the Pi when first configuring. They can be taken off and a terminal opened as usual later.