1. No offense, but this is the same mantra we've heard from G since day 1. Nothing new here. Nor is it "any" type of line because...(see 2)
2. Every webmaster here can point out sites on the top of their SERPS that DO get or buy links from rather irrelevant sites. Big name sites that don't have 10% of their links from even remotely "relevant" sites. Which leads to ....(see 3)
3. Webmasters not giving any "trustrank"(tm) into what Google preaches and what actually works.
Care to expound?