I don't think I move among bad developers, per se, but when I consulted I generally worked at places that weren't software companies. HN is filled with developers who plan to build companies (or work for companies) whose core business is to build software and either sell or have that software be the key part of a service. A lot of the places I did consulting for, if all of their in-house software stopped working, they could probably still do business, but a lot less efficiently. Most companies are not "about" the software just like they're not about the desks in the office.

And actually... quite often I wasn't brought in to second guess the architect. Many times I was brought in at the request of the architect. But yes, most of the time you're brought in because they lose faith in the architect or team. If you see me stop by to do a simple audit of your code, you should probably get your resume ready -- well not really, as I don't do any consulting any more.