Companies are made of humans

I'd not expect that at all. My experience is that questions about open source licensing leads to lots of blank stares when you ask the legal department, assuming you even have one. They specialise in contract law, that's their daily job. Generally there's one or two employees who think open source licensing is important enough and eventually it lands on the desk of the owner/founder (it's a privately owned company after all) and they make a business decision based on the perceived risks.

Would any of this reasoning be documented? Unlikely, it eventually becomes lost in the mists of time. Does that mean mistakes happen? Of course. Running a business means making mistakes. Does that mean we should send the rampaging hordes at any company for any mistake? No, because sometimes it's just an honest mistake and in much of the world, honest mistakes are not overly punished as long as you take steps to correct them. Which from what I see they are doing.

Entrepreneurs are used to taking decisions based on incomplete information. Lawyers are expensive, so you don't want to engage them for small fry.