No just leave alsa (required for any audio) and pulseaudio (required by a lot of stuff on Arch like for Firefox) and follow that post for the rest.
Yep, it’s another front end for jack, but cadence is much nicer / easier in my opinion 
It’s not a hack really, but like i’ve said in a lot of pro-audio gear you either won’t see all I/O or audio interface at all, in that case jack will help (apart from being way better tool) think of it as something like a driver for your device…
Probably pipewire will fix that problem in future (it’s pulseaudio debloated inplace replacement), but it’s too early development to be sure of that 