Alcohol can kill you, both from ingesting too much and from quitting after heavy usage. Cannabis does neither, and that's not even close to "roughly."
There are smokeless consumption alternatives, which anyone mindful of their lung health should choose instead.
No one is saying smoke doesn't cause lung cancer. What is being said is that cannabis consumption will not kill you via overdose.
Alcohol can kill you, both from ingesting too much and from quitting after heavy usage. Cannabis does neither, and that's not even close to "roughly."