To oomis,
There is a heter on the issur of “Guard your life exceedingly” that if everybody does it -you aren’t oiver the issur. (Like crossing a street, even though it’s somewhat dangerous.) Rav Moshe relies on this to say smoking is Mutter. My point is that was awhile ago, nowadays due to health concerns- a lot of people aren’t smoking, so it’s hard to make the claim of “Everybody’s doing it!”