I agree with the sentiment, but for most of history there has been some sort of ceremony when taking a photo, saying cheese for example, it used to be much more

I agree with the sentiment, but for most of history there has been some sort of ceremony when taking a photo, saying cheese for example, it used to be much more obvious when a photo was being taken, and now its discrete in many situations. People that knowingly smile for a photo aren't really the people complaining.