Agreed. What was rude was not to offer a cigarette to the other person before you lit up.
I worked at a TV store where we had an ashtray on every few TVs.
I remember you always waved the pack to a person with a “eh”. I actually still have one of those cigarette host boxes you’ll see in old movies, anybody that wants a smoke can have one, it’s empty, but I like it. I remember when “fancy” places would emboss their logo in ashtray sand, always felt bad about being the first to put a butt in it, usually aim to the side to not mess it up.