associated with lower risks for tobacco use disorder-related health care measures, including reduced smoking cessation medication prescriptions and counseling.
At no point do they use the word "quitting", for a reason. Cessation isn't the same as quitting, and it's not even straight up helping with cessation. It's "reduced smoking cessation medication". Some of those medications are pretty much the same as weight loss drugs, (and some actually exactly the same, being used for both) as they're both dopamine antagonists, because nicotine and food are as well.
Tldr oversimplify if you give people already on amphetamines more amphetamines, some of them will go "gosh, this is quite a few amphetamines, I think I'll have fewer"