Yes of course this could've been done in photoshop. But a convincing Photoshop effort takes someone with years of experience working for likely hours. AI can churn out this kind of image in seconds, operated entirely by someone with zero skill or experience. It lowers the bar significantly, increasing the scope and scale of the output.
For the same reason a fully automatic weapon is substantively different from a bolt action rifle, despite both being guns.
It's also a fundamentally different scenario. Photoshoot-style touchups - likely at the request of the subject himself - for pure vanity, versus doctored images of an unwilling citizen (who presumably hasn't been convicted yet and is therefore considered innocent) as propaganda
For the same reason a fully automatic weapon is substantively different from a bolt action rifle, despite both being guns.
It's also a fundamentally different scenario. Photoshoot-style touchups - likely at the request of the subject himself - for pure vanity, versus doctored images of an unwilling citizen (who presumably hasn't been convicted yet and is therefore considered innocent) as propaganda