Earlier quoted context omitted.
When the recent Github v. youtube-dl fiasco happened, I remember reading similarly strongly-worded but dismissive comments regarding fair use, stating how it is quite obvious that youtube-dl's test code could never be fair use and how fair use itself is a vague, shaky, underspecified provision of the copyright law which cannot ever be relied on. To me, seeing youtube-dl's case as fair use is so much easier than using…
How would you feel about a paid-for search engine using hundreds of millios of web pages without permission in order to build a proprietary product ?
My point was however that I'm just utterly failing to see how the youtube-dl test thing could be more of a copyright problem than this entire thing based on millions of others' works that is Copilot.