There is no system level volume mixer, you can't route audio between apps, you can't even monitor an audio output device.
To do anything sane with audio on MacOS requires external applications like Loopback or Blackhole or any of the virtual cable applications.
I don't know what he meant with "audio management", but when it comes to music production, MacOS works way better by default, with system-wide low latency audio and multi-client MIDI drivers.
On Windows, you need to buy a dedicated audio card and install 3rd party audio and MIDI drivers, so that you can finally--assuming you bought the correct gear--get almost the same functionality that every Mac has out of the box.
To be fair, core audio is indeed better default system but any trivial music production involves audio interface, I've never seen a person using direct input to macOS. On daily work, it's pretty much same.
Windows used to be horrid when it comed to music production but that was like almost two decades ago. Been using W10 for quite some time and any basics I need is pretty much there.
On the other hand, hardware taxing when gearing up the equipment is insane on apple hardware, that's why I migrated from their ecosystem. It's a huge drawback for many I believe.
The lack of an OS level volume mixer is one of my biggest day to day frustrations with OS X. Linux is really the gold standard for me though, allowing me to shunt applications around across audio devices on a per app basis when most don't include an output selector.
Sure uh huh. Mac is great when I want to open up GarageBand on my M1 Mac Mini that's connected to my TV over HDMI. It yells at me to change the sample rate to 44.1. I can't do that there is no way to do that. I also can not control the volume using keyboard volume or system OS volume. Mac OS is great! Also the HDR is questionable unless you are using an Apple display which I am not.
Edit: basically what I'm getting at here is one is not better than the other and one is not worse than the other every single OS has quirks and honestly you should just be running one of everything in your house if you need it. Make sure to always have an up-to-date latest Mac and run WSL 2 in Windows 10 or 11.
There is no system level volume mixer, you can't route audio between apps, you can't even monitor an audio output device. To do anything sane with audio on MacOS requires external applications like Loopback or Blackhole or any of the virtual cable applications.