Forget about kabbalah or Halacha or Avoda Zora or whatever else and think plain mentchlichkeit. Would you want a random stranger or acquaintance or neighbor running up to you and sticking a camera in your face and snapping your picture without your permission? How about hundreds of such instances? I sure wouldn’t and I’m sure there vast majority of people wouldn’t. Even if it is “legal”. Most people wouldn’t agree to it or even give permission if asked by random people.
Who wants their picture hanging in random people’s houses or traded, shown off, sold or published in mass circulation newspapers of a million unfamiliar people? Not most normal people and not most Gedolim. Only an egomaniac would want their picture mass published. They don’t stop it? That’s only a raya that they are forgiving people who don’t need another losing fight they’ll have to forever battle.