If you're arguing with your boss's boss's boss, who has worked at the company for five years and the industry for two decades, and you think you've unraveled their entire argument by reading a few blog posts, you're wrong approaching 100% of the time. Best case scenario is that you've missed something specific to your company, or industry, or the current technical implementation, or some obscure contract the previous CTO signed that they're still trying to get out of.
In pc86's scenario, though, it's much more likely that you're the one with the ego, thinking that reading a few blog posts makes you more informed than a 20-year industry vet.
In my experience it's rarely (read: never) that clear, is my point. When it's that "obviously" wrong, there's almost certainly something you don't understand.