Because nobody wants to plan anything, nothing is planned, and because we desire everything everything is about 'experience'. This is a shocking and disastrous state of affairs, but an absolutely perfect example that you cannot think something in an atmosphere which is not conducive to thinking it. That's why Nazi Germany didn't need a police force to speak of.
Of course you would like to think, precisely because we enjoy our history and that Benevelo book arrived from Portland Oregon for me today, and I think it's fabulous, that there would be enduring principles, but all that's solid melts in to air, as Marx so pertinently put it, so there aren't. Shame.