I understand where you’re coming from, but the “link” between smoking and lung cancer is not clear at all and the “science” which claims this correlation is bought and paid for.
This book is worth a read - written by a doctor and debunks all of the so called science:
https://x.com/andrew_j_howard/status/1668121800310665217?s=46&t=5Vi2dEZ0ov1NaAKGdg84FA