I fail to realize how it matters how much it is transformed.
And ignoring when people explain that it does.
You want copyleft to be super duper copyright, where even quoting a sentence of a Cory Doctorow novel demands an entire newspaper gets GPL'd forever. We don't care what fair use says! This anti-copyright goal demands more protection than mere copyright!
This is silly.
Transformation is where copyright does not apply, because you did something new. No matter what works you referenced - your thing is different. It's why Disney can't sue Wikipedia for articles describing their movies. It's also why Wikipedia can't sue OpenAI for models describing their articles.