Heh, funnily enough i thought about a very similar topic this afternoon.
I do think that the rationality of a lot of people is overrated. I certainly think though, that there are some pretty reasonable folks out there. Although maybe that's just my delusion, eh ?!

Again, the problem with that line of thinking is that it skirts, for my taste, too close to the BS "all is relative" notion. Or let's put it that way: If you let some parts of society stew too long with that idea in the front (that "being rational" is all BS / everything is relative), they jump to very unhealthy conclusions.
Just as unhealthy, imo, as those opinions that want to regulate society with more "logic" or, as above, with reason/rationality.
I just think, to take up the example of the last quoted paragraph, that there are some consumer-habits that should be penalized in our health-care system (especially in insurance costs). The "laissez faire"-attitude of our western culture has gone to ridiculous extrems and i think it is not ok that the community needs to pay for that.
So i guess i disagree with the general sentiment of the last quote. It is the individual AND the companies that are at fault. Just blaming it all on the evil companies is as wrong as blaming it all on the individual.