This is exactly the same as the ""If you didn't take the time to write something, I'm not going to the take the time to read it" mantra that was floating about HN a few months ago.
I think in many cases people use LLM outputs without even understanding the contents of it. You're only really able to say something in your own words if you understand it. As a matter of fact, it is a good way of probing if you truly grok something. So it isn't just laziness to write, but also laziness (or inability) to understand.