In general, any photo you see anywhere is going to be cherry-picked. Of course, that only goes so far. If you have a crowded school corridor with almost no one wearing masks, well--that happened. But it's hard to draw broad conclusions generally because of what seems like a somewhat crowded restaurant or an empty street.

A lot of people also bring their own beliefs about what is appropriate to the interpretation and discussion.

Ye, I agree. As a note, schools up to 15 y.o:s were open so photos of those should show a lot of pupils.

Although lots of promises in many places about distancing and masks and so forth that no one who has ever been or ever been around anyone from Kindergarten kids to college students actually really believed.