NY Mom
yes not every yeshiva is like your sons. you (and hopefully your son) decided what yeshiva was the place for him to shtieg. but for many your sons yeshiva is not the “place”
they need a different setting.
i therefore conclude that camparing one yeshiva to another is like comparing a skinny person to a fat one. they just have different genetic makeup!
ps (of course if the hanhalah doesn’t allow they will hide when they do it, like done in many places.but i dont know what yeshiva your son attends and its very possible that no one in that place smokes, good for him. and good for you.)