Cigarettes actually are uniquely bad when it comes to lung cancer. Lung cancer was very rare in 1900 and before when everyone was still burning wood or coal for warmth and cooking. Lung cancer rates didn’t take off until cigarette popularity exploded after WWI.
Chewing tobacco also causes mouth cancer, so there’s more to it than just inhaling byproducts of combustion.
Also scientists were recognizing the link decades before governments finally caved and regulated the industry and decades more before those industries were significantly curtailed by limiting advertising.
Then they bought a new brand name and started running the same playbook.