I empathize w/ your take. I've occasionally responded similarly to the thoughtless use of "cancer" in shallow analogies, as a survivor who's also watched it kill several people I dearly love. I don't have direct experience w/ heroin, but the film "Requiem For A Dream" was unforgettable and helps me better understand its evil.

Unfortunately, whether it's a deadly drug or a deadly disease, these casual references are unlikely to drop from public discourse anytime soon. And I personally would rather live in a world where insensitive or potentially-triggering language is gently discouraged, than one where the pendulum swings too far the other way towards censorship or radical left woke cancel culture. Words can be unintentionally callous without being "micro-aggressions". (And I say that as a liberal progressive.)

Thanks for posting in a personal and persuasive manner, instead of anger. Yours is the more effective approach anyway.