Short story? Don't like it, don't use it. Use your fav distro and let others use theirs. To each their own.
My experience with PA is that it works just fine (Using Xubuntu 12.04). I run wine games (Ie. Skyrim, Civ4, etc) with sounds playing along with media players and web browsing (youtube et all) and it all works as expected, simultaneously even. I have reproduced the same experience in various different machines; you might have a particular problem with your setup.
Valve doesn't need to do any disabling because the stuff works fine. What they might do is customize the interface for their own needs if they go with a linux console or games distro and need a much simpler interface; Ubuntu TV style.
I know very well pasuspend, DOESN'T solve the problems AT ALL.
Full of lies on what ?!? WTF as the minimal CD to do with PA and UBUNTU ?!? Does yjr minimal CD not include PA ?!? Let's imagine that it doesn't....SFW ?!? As soon as you start to pull the audio-related apps from the UBUNTU repositories, it will install PA.
Yeah, in that you are correct, i don't like it , i don't use it.
BS !!! You play the *WINDOWS* versions of them via WINE..
Play a NATIVE game like ETQW in a PC with REALTEK AUDIO and press one of the VOIP buttons of the game....CTD.
Install a JAVA game like JIN FICS Chess client, enable audio and let's see if you get any audio of it.
Notice that i had two MB with build-in audio from different brands and same s**t with PA happened .