I would have preferred "experienced" instead of "dumb". His examples still apply if you replace the latter with the former.

But "experienced" is another one of those glowing words (like "smart") that emphasizes you knew your way around in the past. This is an external marker, something other people judge you by and you can advertise with. When you have to solve actual problems, it's no good to think of yourself as smart and experienced, because that will only frustrate you if your amazing talents don't immediately suggest a solution. Taking yourself out of the equation and treating each problem by its own merits rather than your own merits is what's required, and that's the point of the "lazy" and "dumb" epithets: they're a deliberate kick to your ego, something programmers can usually use less of. Your talents can take care of themselves.