Earlier quoted context omitted.
You seem to be missing the point of the article: producing less bugs and better code can be wrong if writing that code slows down finding out what the problem is. Speed-of-writing-good-code is an orthogonal parameter, here.
Why is writing good code slower than writing bad code? I'd rather write good code once, now, rather than bad code now and good code later.
For example, right now I'm helping a friend out with a project to send email. In about 10 minutes I could whip something out that does this using backticks (i.e., shell escapes), no error checking, no logging, etc. It would be in front of the customer and suitable for feedback very quickly. It would also be short, easy to understand, and would do its job correctly 99% of the time. All of these are good things, but it would still be bad code, because the other 1% of the time it's going to break horribly and someone is going to have to come in and fix it.