I guess it is just because 1) They can, and 2) Everyone wants some data. I think it would be interesting if every website out there starts to push out BS pages just for scrappers. Not sure how much extra cost it's going to take if a website puts up say 50% BS pages that only scrappers can reach, or BS material with extremely small fonts hidden in regular pages that ordinary people cannot see.
Yeah something like this, would be nice if it actually feeds bad data that requires human to double confirm, too. Not something seriously wrong but something subtle, like changing a couple of letters in a name of a country, or randomize the National day. Once a lot of websites start to use it AI might actually get confused, I think? But humans never read these pages so should be largely fine -- unless they are reading AI summaries.