Well sure, but these guidelines exist, the robots.txt guidelines has been an industry-led, self-governing / self-restrictive standard. But newer bots ignore them. It'll take years for legislation to catch up, and even then it would be by country or region, not something global because that's not how the internet works.

Even if there is legislation or whatever, you can sue an OpenAI or a Microsoft, but starting a new company that does scraping and sells it on to the highest bidder is trivial.