Unlimited scraping makes some of privacy regulations moot. Such as right to erasure (ability to delete personal data from a platform).
Let's suppose an embarrassing image of Person X is shared on Facebook and Person X uses their right to erasure with Facebook to delete their profile. Facebook has no control over the folks who may have downloaded or screenshot-ed that photo and turned it into subsequent memes. Likewise, if someone straight up scrapes and re-shares, that's not Facebook responsibility.
What I don't want to see happen is for:
1. Facebook to make it somehow impossible for anyone to ever copy or screenshot that or any photo, preventing anyone from ever doing anything with photos on Facebook without Facebook's explicit permission. This would seem to be quite the loss of user agency for very little society wide benefit (also, how would they do this?)
2. Facebook to somehow "control" that photo so closely that Facebook is able to remotely revoke folk's copies and screenshots of said photo in the spirit of "abiding by a persons right to erasure"; that'd be a huge overreach, but seems like the only other way to approach this (though "how" is also an open question).
Even asserting that "unlimited scraping makes some privacy regulations moot" seems like an implication that we can only have privacy laws by going towards situation #1, and that doesn't seem accurate given that folks can use existing privacy laws to remove content from any distributor (as long as they're compliant).
In case you really need an example to elucidate, consider reproducing an image. A scraper can quite literally accomplish that, trivially; a great artist would still be limited in multiple facets of the recreation, such that even one with the best memory and hand would find themselves far short of pixel-perfect.