I am assuming you've never had a C type person make huge IT decisions without having even consulted with IT.
In my 30+ years of experience, I've seen enough clueless C types make clueless decisions because some dude in a suit with a briefcase sold them a nice fat lie.
In our case "All it will take are a couple IP addresses and a server. No other IT is required" If it takes IP addresses and a server, it requires IT support. And in this case, the product was so fucking horrible that it requires regular (several times a week) IT support, just on back end crap from a product designed so bad that it just breaks every two weeks from design flaws.
Or this, "We've already bought it, you WILL support it" (with no additional IT funding for more IT help) multiple times over.
Or buying a mom and pop application with no Enterprise class requirements in its design. "What do you mean you don't do LDAP for authentication. There is no fucking way I'm entering 16,000 users by hand"
The issue with certain people is that they want "Shiny Pretty Technology" without caring, or wanting to know about what it actually takes to run. And it happens in enough organizations that I know that it is not an exceptional experience.
You're right, the C types don't know shit, which is why they should stay out of shit that they have no clue on. Yet they think they know better than the people who REALLY do know whats going on. In short, IT is a bastard child in most organizations, one that has more power than most of those C types actually know.