Since I've taken a recent foray into management I'm also inclined to disagree slightly with the article. In big tech I see a lot of managers as people who's main goal is climbing the corporate ladder and therefore don't want to make waves. If you're more concerned about your reputation than doing your job it'll affect your openness. This isn't limited to tech, it's just the corporate ladder. Engineers are treated more like children than idiots, but I think that distinction is minor.