The problem of filming/photographing in public is not new and this type of legislation already exists in many (all?) European countries and falls under existing privacy laws...

If a deepfake is made of someone, that person was clearly the subject of the image/video and thus violates his/her privacy. This extra legislation would help protect in case the original image/video was taken with consent (so no privacy issue).

There are image processing techniques that can remove the people from a crowded shot, allowing you to take pictures of landmarks during the day as though there are no people around.