Scraping the internet isn't a copyright violation. Using it for LLM training is much more transformative than Google and Internet Archive, which are legal.
And just like that, I totally agree with you
There are several components of the Fair Use test, "transformation" is just one of them. The most important dimension is the effect on the market, i.e. the effect on incentives.
You probably shouldn't base your legal analysis on pithy internet comments regardless of how succinct or agreeable they are to you.
"Copyright violation" is what we call the set of things that destroy the incentive for people to create original work by unduly benefitting from someone else's original work.