I'm not sure why this article bothers attributing this insight to the former Slack CEO, this dynamic is nothing new and was a problem well before Slack or the current round of tech companies were around.
I may just being nitpicky here. With such a commonly understood, and old, concept it doesn't need ant attribution. Name dropping a random CEO just feels like a cheap addition to get eyes on an article.
I suppose it kind of is, or an 'appeal to authority', I just don't see that as necessarily bad, it's just like 'don't take my word for it, someone you might actually have heard of or in an important position said blah'.
Proper journalists and newspapers spend plenty of time quoting politicians and senior employees making obvious or previously said remarks too.