Their argument on page 10 is that now agentic coding reduces the effort of writing code there will be far more failures unless you validate the idea properly.
We are actually seeing that in that the number of apps on the app stores is increasing but usage is not increasing.
Some would argue that the right process will lead to the right results.
The barrier to entry drops and so more garbage enters the market. This has happened many many times but there can be a massive and beautiful paradigm shift at the same time. Think about YouTube. Most stuff on there is garbage, but compare the good stuff of today to pre-YouTube content. To be quite honest, I think most of the best media is going straight onto YouTube.