People come to Cannes just to advertise their films, not with a particular message. But the advantage is that if you go to the festival, you get so much press coverage in three days that it advertises the film for the rest of the year.
I don't think that the administration is being particularly honest with the American people about what this is going to cost in life and in dollars, what the dangers are, retaliatory strikes, once it happens. This is not a war that needs to happen immediately, if ever.