It reads like the author never debugged a program. Development speed is not just the time to write code, but also test, stabilize and debug it, with most of the latter being a risk that might cost you a lot much later. If your engineers have to take a two hour or two day or two week timeout to debug issues from weeks, months, or years back, then that really costs as development time.

Vibe coding is going to make this so much worse; the tech debt of load-bearing code that no one really understands is going to be immense.