I don't understand this manifesto business. Everyone wants, and can get, something different out of a career in software development.
Why do the "501 developers" care that some people would rather program late into the night than go out with people. Likewise, why should anyone care that the they would like to have enough free time to engage in other hobbies.
If I want my job to define who I am, who are you to tell me that it's "wrong"? If you want the free time to do other things, go for it, but don't assume that the lifestyle you want would make everyone happy.