I had morphine after a hospital thing years ago, and it honestly was wonderful. It's a little hard to explain all these years later, but it was a great feeling of calm. Just unworldly and unburdened. Someone could've told me the worst news in the world, and it would've been met with a shrug and a "that's too bad".
If heroin is even close to that, I can see how people wind up in trouble with it.
Never did Heroin, crack, meth, coke etc. I tired booze a few times, hated the taste and it made me feel sick .
I tried pot a couple times (* bong and a joint) and it made me feel dizzy and confused, not high.
Having said THAT, you're right, EVERYONE has the potential to get high and hooked on some substance .
I'm so laid back , I suspect cocaine would be highly addictive for me, so I don't get near it.