I think you're really jumping the gun here. No one said that this single failing business discredits the philosophies behind the running of the business. As in

I think you're really jumping the gun here. No one said that this single failing business discredits the philosophies behind the running of the business. As in everything there can be implementation failure (as you have so currectly pointed out). There's also the other failure case of a mismatch between principles and the existing context. Maybe these principles work just fine in other contexts and other fields, but they're a poor match up to this one and can't be used without a lot of tweaking (e.g. Agile techniques applied to the manufacture of airplanes; it can be done but you can't just say 'we will do standups and sprints and everything will fall into place').