I feel this is more a meme, rather than reality. I do check StackOverflow, but never have I took an answer verbatim. I try to see if it's the same problem and what was the approach in deconstructing it, which I find more useful in the long run.
"One out of every four users who visits a Stack Overflow question copies something within five minutes of hitting the page."
https://stackoverflow.blog/2021/12/30/how-often-do-people-ac...
At least for me, that's most of the copies I do, followed by the ones that basically are 'call these functions in order', then paste it as a comment and use it as cheat sheet, and only very rarely I copy a 'creative' snippet almost verbatim, like a regexp matching email addresses, a to-hex or a crc calculation. And perhaps that's actually tricky.
All the time.
I've certainly copied a sort anonymous function from SO, it was one-liner. Is that copy/paste? or is it only copy/paste if it's X lines?
Otherwise I agree, usually I just get hints and go my own way.