And you've never met the code that was quickly scraped together for personal use and continued to be used despite the fact that the output always needed to be hand-edited, when it worked well enough for that? Even working off your example, I'd say there is a lot of personal code out there that's "hideous, inefficient" and "badly designed". Furthermore, anything must be judged against the requirements; when "over"large is in demand, and efficiency not considered important, holding those against it is absurd. The tradeoff of "built fast" at the cost of being "shoddy" is not one unheard of in personal code, either.
Even accepting that, one example doesn't prove the whole case. Since virtually all buildings are paycheck buildings, you need to argue that virtually all buildings are bad buildings.