Isn't that kind of like saying "drunk driving is a straw man, Uber makes it a non issue"?
Of course we know there's less harmful ways to consume these substances. We also know many, many people will not make use of those less harmful ways.
https://www.lung.org/stop-smoking/smoking-facts/marijuana-an...
Smoking WHILE on cancer therapy: "A number of small studies of smoked marijuana found that it can be helpful in treating nausea and vomiting from cancer chemotherapy."
Anti-cancer benefits: "More recently, scientists reported that THC and other cannabinoids such as CBD slow growth and/or cause death in certain types of cancer cells growing in lab dishes. Some animal studies also suggest certain cannabinoids may slow growth and reduce spread of some forms of cancer."
Source: https://www.cancer.org/treatment/treatments-and-side-effects...
Note: The American Cancer Society page on "marijuana and cancer" doesn't mention lung cancer at all.
As for lung cancer, that's a straw man, vapes and edibles make that a non-issue.