Yes, you do. It's not cheap, either.

I've tried the open source version but unfortunately they don't work as well. SoundSource, though expensive, works well because of their sound engine called ACE, other open source solutions had other ways of redirecting audio. Though... RogueAmoeba(the devs), through the power of ACE offer other audio apps I use such as Audio highjack and Loopback, and I can really easily process the sound, recording it and add effects, even the built in ones from apple, like the sound isolation I apply on my mic, I can apply to the audio output or application outputs as well so when I record a meeting, if the user didn't have a great mic and good noise cancelation I can apply the effect that comes built in by Apple which works really really well. I know, it sucks I have to pay but at least the apps are really really well done and nice.

I also pay for Setapp because a lot of really good apps are included that I use so I can make my Mac experience better, because honestly it misses a lot of features. Yet again, the silver lining is that the apps are built really well. Without all of these custom apps I don't know how I could use a Mac. You even need software like Rectangle because macos doesn't have built in window snapping.

I used to be a Linux user, I have been using it for quite a while(more than 5 years), but unfortunately I'm not just a developer anymore so I need to office stuff and develop... And it's been the best experience by far on Mac (I also have to test some apps I make on iOS so I need XCode). Developing on Linux is amazing, but unfortunately I need to do a lot of different things and it's been the best experience on MacOS with apps that add the features I am missing. I prefer Unix like systems and stuff to just work so you won't catch me on windows, but I did have to install windows on my Linux machine because some things I have to do only work on Windows so I gotta have that. It's just my usecase and this is what works best for me. I tried to linuxize my Mac to have the GNU utilities but unfortunately stuff started to break because they adapted it for the way the Mac utilities work... Ugh, I so wish I could have the GNU utils.