Are you sure about that? What about "non-serious" companies? Various fly-by-night self-driving startups?
I mean, this sounds like the machine learning equivalent of "no serious business is pulling random bits of code from StackOverflow or whatever tutorial popped up first in the search results", and yet I think everyone who worked with software for more than few years can confirm that companies absolutely do it, and a lot.
(Tangentially, PHP got a bad rap in large part because of this - people not knowing how to do things correctly copying code from tutorials written by people who didn't know it either; these days, JS ecosystem is getting a bad rap for having such bad code wrapped in neat and easy-to-install NPM packages.)