Agree, my model isn't complete. Unrelated to your point but I think a lot of people who write really bad code are the only choice because they are experts in a

Agree, my model isn't complete. Unrelated to your point but I think a lot of people who write really bad code are the only choice because they are experts in another essential domain, and there aren't a whole lot of experts in both that domain and writing software. So you do what you can. There is a reason that code written by EE's is often derided as terrible.