If masks contain spread and everyone wore one, it would lead to less cases.

The problem is that there are not enough masks to go around. But if there were, i would recommend everyone wears them. Just so it would make it socially acceptable to wear one if you are sick.

Few if any people with it know the exact time they become symptomatic and start viral shedding. Everyone should assume they might be sick when in public and could be shedding. With this standard everyone would wear a mask.

I'd like to see a source that they do not protect from incoming droplets. This seems to be completely false.

That's not even true, I saw a study that showed that even makeshift masks reduced the risk of infection, though obviously not as much as a N95 mask.

Same everywhere in Europe I think, people get scared if you are wearing a mask, which should be the opposite...