Oh dear.. I'm not going to comment on that. I don't think it's productive.
> I never experienced any trouble with audio
I refer to stuff alsa drivers reporting wrong values[0] or cards being locked to a specific rate [1]
Before pulseaudio only one application could access the sound card. And alsa-mixer was broken half of the time. The list of defects goes on and on. Configuration relied on different settings of also that needed to be tuned for each driver separately. Getting sound to work on Linux was not a fun place to be.[2]
Pulseaudio exposed all these problems using a unified interface and forced "us" to fix these bugs.
[0] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/410887
[1] https://lore.kernel.org/all/1034325263.474.37.camel@diesel/T...
[2] https://www.techrepublic.com/article/configuring-linux-sound...