Definitely not really stigmatised in my country - no matter how I wish it was, I despise inhaling this sh*t when someone's walking along the same space smoking in public, and I also have other personal reasons.
That being said, just you do you. It's your character, your story, your decisions. Depending on context, or the way you frame it, or if you decide to address it in story (or in outside commentary), you can get the readers to understand your viewpoint in case you'd like to avoid misinterpretation.
As much as I hate smoking IRL, one of my main characters is an old lady smoking a pipe - there are, however, in-story reasons for it, though spoiler alert, they are mainly superstitions and snake oil sort of remedy.