Using AI to colorize, smooth, and retouch photos in books: Is this normal?

The following observation comes from reader and librarian Jessamyn West:

The newish Woodrow Wilson biography [published by Simon & Schuster] comes with a whole bunch of photographs in the center of it. All of them have been colorized and, to my eye, AI ‘smoothed’ and retouched. This is just close enough to when color photography became used that I think the decision to colorize (which is only mentioned in the back credits, as far as I can tell) was an odd one and likely confusing to readers who will think the photos were originals. Anyhow, it’s been stuck in my craw and I found it curious. Here’s a little post I made on social about it. And the link directly to the photo gallery. I guess I’m just wondering: Is this kind of normal now? I don’t notice anyone mentioning it in the reviews I skimmed, except one mentioning that it has color photos. I’m really surprised more people haven’t said anything.

If anyone has insights to share about this practice—especially in researched nonfiction books like this one—I’d love to hear from you.