I mean, why doesn't anyone do that now? Instead of hiring a photographer to come onsite and spend several tedious hours with you, just email them a single photo

I mean, why doesn't anyone do that now? Instead of hiring a photographer to come onsite and spend several tedious hours with you, just email them a single photo and let them Photoshop something good. It's not as cheap as AI, but it should be cheaper than paying for an in-person photographer, and the results can have any background you want. There's a difference between discovering an old photo and thinking "haha I don't remember taking this one, we looked so good" and seeing it and thinking "haha I don't remember taking this, oh right because it didn't happen". In the second case, there's no reason to even have a photo album or generate anything at wedding-time. Just store the single base photo, and then 50 years later when you want to show the grandkids you can just have the computer generate whatever they want to see.