Adding default support for Airport remote sinks in PulseAudio

In another case of "what were they thinking?" it has been my displeasure to find that support to discover remote Apple Airport audio sinks is not enabled by default in PulseAudio and, in practice, enabling this requires the user to install paprefs just to enable the loading of two modules (module-raop-discover and module-zeroconf-discover) that really should have been loaded via the global /etc/pulse/default.pa by standard. The question is, why? I perfectly understand not enabling the publishing of local audio sinks by default, but why prevent the discovery of remote audio sinks by default? More to the point, why force the end-user to jump through hoops and Google for hours just to enable something that really should have worked out of the box?