The trouble with this thread and similar ones is that many comments are opinions that follow one’s desires, not fact based. The ones on cigarettes border on foolishness, since the overwhelming majority have spoken clearly about the issurim involved. Yet, the frequent comment from those who wish to smoke is that Reb Moshe Feinstein ZT”L was matir smoking. This is actually a dirty lie, obvious to anyone who has read his tshuvos on the subject. Here. too, I expect evidence to support a heter to be nowhere found, yet justifications and rationalizations everywhere.
The definition of rationalization is where the answer precedes the reasoning for it.