No amount of legislation can outweigh the technical reality.
That's the reason you mostly see the pretty dumb guys getting caught. As long as you are smarter and more tech-savvy than 80% of the criminals, you are pretty much out of reach for the feds.
YouTube have decades of attempt at determining if uploaded content violates copyright, normally through fingerprinting content submitted by right holders. YouTube still fails at catching all copyright infringement. That's why they are generally protected from prosecution while they demonstrate reasonable attempt that preventing their services from being misused.
Imagine ALL IMAGES IN THE WORLD being submitted for fingerprinting. How about malicious or erroneous submitions that taint datasets?
Also: right to be forgotten is a horrible misleading name. At most you have right to request data to be removed from datasets. And only if you have some legal basis that demonstrate that your data is in that dataset. It is not a right to be "forgotten". Imagine you yourself being told to "forget an image, sound, etc", how is this enforced? You may even ask for proof that you know the content you are being told to forget. How do you do this?
It is illegal to possess, but despite the most aggressive enforcement on the planet it is still out there.
In case of personal data in this article, they have already identify which legal entity have it.
From the article I'm extremely skeptical people have actually identified anything, since LAION does not store content. LAION is a list of links to content hosted by others, publicly.
Maybe realistically any uploaded content can be found somewhere on the internet forever (I doubt that, tbh), but this doesn't mean we should throw our hands up and say "it's impossible to regulate".
We already have precedent for this in the form of copyright/DMCA takedown requests. The MPA/RIAA has a legal avenue to protect their content, why should it be any different for individuals?
An online shop in Germany once removed Cuban cigars because of US trade sanctions.
ClearView just declared to ignore the right to be forgotten, even for EU citizens. It will be interesting to se how this plays out. I guess it will take a few years…