> Like if a culture is bad, is it likely a CEO is going to be looking for random blog posts for constructive criticism?

The CEO (or at least the founder) created and cultivated the culture of the company thus far. If the culture is bad, they are the single largest reason why.

You are right in that execs won't seek out the blog article which criticizes their strategy... unless they actually want to steelman against their own position (which is a very useful activity but few people do it).

But the CEO doesn't need to find it on their own. They surround their self with a Board, investors, sales people, managers / leadership team, people from their MBA program, etc. the article just has to plant a seed which grows somewhere in that ecosystem.

That said, the article may not be right. The largest and most successful companies in the world aren't the ones with the best company culture. They simply work in industries where the money is so prolific that the people who want to work in the industry are already highly motivated. The CEO doesn't need access to this information because it isn't true; it simply tickles your cognitive biases.