Taking a photo is a different action. You don't need a consent for it in public. Just taking a photo is the sole art purpose if you the aim is not distributing

Taking a photo is a different action. You don't need a consent for it in public. Just taking a photo is the sole art purpose if you the aim is not distributing it. Selling those pictures to brands is a different action. Selling those pictures to the subject itself is different action. Using those pictures as a papparazzi is a different action. All of them is as complex as street photography. Legality of all photography intents viewed differently in different jurisdictions.