I haven't met one that argued it isn't bad, but many have certainly downplayed it, or they have wildly different standards.

Like...15 years ago, I dated a girl that smoked, but wouldn't eat anything with artificial Blue or Red color because supposedly those cause cancer. I said, "You know those cigarettes cause cancer, right?" and got met with a "yeah whatever".

That relationship didn't last (for many reasons), and I'll never again date a smoker. I always felt we were limited on the things we could do because she HAD to have that cigarette every ~30 minutes.