But that's arguing a different thing isn't it: the idea that the UP has a special location specifically related to its purpose is not the same as saying the other end of the UP might point to somewhere of importance, since the second statement will not hold true for all places where the first does.
As an example, let's say that the UP's special place is within a certain distance of Earth - well, at any given point in time, at least half (and likely many more) of all the locations you choose which fit that criterion will yield a position where the UP points away from Earth itself, but, even more importantly, to nowhere in particular.
So I'm done with this debate now. I'm happy to entertain the possibility, as Han_Zen reminded us that the UP behaviour changes near to a planet, that there might be a location which is somehow more important to the UP - but the 'other direction' in which the probe points when at this location is not important - because it won't ever be fixed.