Um, no-brainer: if you sell something people can use can on their own servers, you can't spy on their logs. Everything Google does is geared towards collecting data, so the other Urchin products are really not relevant for Google.
They don't appear to be relevant to Google because they don't help Google better determine ways to leverage AdWords and AdSense. GA's JavaScript snippet in fact returns to Google more and more pertinent information than is resident in the average web server log file. Plus it removes the spiders and non-page view data just by being a JavaScript-based tracking solution so that's less work and cleaner data for them (and anyone else who does this e.g. all of the other Web analytics vendors).