Earlier quoted context omitted.
Its not like the CEOs unilaterally said "we want to suck now". It's the cumulative effect of many people optimizing for the promotion process within the company and then coaching their mentees to do the same.
Are not the CEOs responsible for cumulative/emergent effects?
I'm not lionizing Sundar Pichai here, just saying the cumulative attitudes of 10k L7/L8 is really what sets the culture.