Might want to recheck that, according to numerous articles I've read, all of the above luxury brands you mention have already moved heavily into AI generated imagery. Will they continue to use photographers, yes more than likely, but AI is still developing. The advantages of AI from a bottom line standpoint, are to attractive not to be used. The kicker will be the public's reception. On that subject, I found this an interesting read
The Luxury Dilemma: When AI-Generated Ads Miss the Mark | College of Business the study found that "when" the viewer was "told" the image was AI they viewed it more negative than when they were not. They also, concluded that the creativity involved in the production had a bearing on acceptance. Those exhibiting more creativity were actually viewed positive, even when the viewer knew they were AI generated.