I think the post falls into the typical trap of opioid determinism—the idea that "if you try heroin, you'll get addicted, because that's what happened to me."
The reality is more complex, "only" ~25% of people of tried it get hooked. While I believe that opioids are generally not worth using recreationally (with perhaps the exception of milder ones like kratom), I also think the view that recreational use is impossible is just as harmful, as it absolves people who have tried them of their own responsibility, because once you try them you'll find out that that they not that difficult to control, then you'll let your guard down and thought you have been lied, and that's when you get hooked.
I've tried heroin a couple times like 8 years ago and I didn't became an addict. I don't think is really better than oxicodone (which I've tried around the same time a couple times as well). Don't get me wrong, I don't have any desire of keep doing experiments with them because their addiction potential OFC, but if you've tried it a couple of times, don't worry too much; just don't do it anymore, and that's it.
As a final statement: DON'T TRY IT, it's not worth the risk, there's drugs that are more interesting. But if you DO, don't be a retard and take precautions.