"Mostly" is doing some heavy lifting there. Even if you don't see a problem with reams of copyleft code being ingested, you're not seeing the connection? Trusting the companies that happily pirated as many books as they could pull from Anna's Archive and as much art as they could slurp from DeviantArt, pixiv, and imageboards? The GP had the insight that this doesn't get called out when it's hidden, but that's the whole point. Laundering of other people's work at such a scale that it feels inevitable or impossible to stop is the tacit goal of the AI industry. We don't need to trip over ourselves glorifying the 'business model' of rampant illegality in the name of monopoly before regulations can catch up.