But you mostly already couldn't do that, right?

What specific behaviors does this forbid that weren't already forbidden?

There is the (helpful to distinguish) 'gap' here. The media org that will report on a politician (for good or bad), will use the politician's 'news-PR-approved-actual-photo-provided-by-the-politician's-PR-team' (the serious one for war-news, the smiling one for the tax-breaks, and so on). They won't deepfake/use midjourney to create a photo of the politician eating an ice-cream while a pigeon is pooping on him (something that Colbert/Kimmel/Meyes/et al would do - clearly as a parody).

But me (not really) on my website (I don't have one) where I trash politicians (I don't) and post a photo of said politician eating poop, that should be 'frowned upon'. (Or worse to shame an ex-gf or a colleague that 'won't yield to my sexual advances').

While reading the article though, I thought of the cases where a paparazzo takes a photo of CelebrityA, then the CelebrityA posts said photo to her Insta (without getting permission from the agency) and the agency sues her. Now (in Denmark) the CelebrityA can sue the paparazzo for taking her photo in the first place (right?). This would protect people from getting uncomfortable photos.