People have overdosed on opiates for centuries. Not just heroin or fentanyl are lethal. People overdose on methadone even.
That being said, sure, why not?

They are all about the money. They don't cut if they cut everyone off to save their own ass after seeing companies being punished.

Not all cases, but yes, in some cases this is absolutely correct.
Things like chronic pain are severely misunderstood, and people are so focused on taking away pain relief that they're lumping in legitimate patients who are responsible, with people who chew on tampered fentanyl patches or buy tainted heroin on the street out of desperation. Another option is becoming alcoholic to numb the pain (and all that comes with alcoholism).
This is underfunded, understudied, and misunderstood.
"Your emotional state is not my responsibility." – Warren Smith

Most seem to go to heroin because they get cut off from a doctor

No,they will still move on to heroin ,because they still be become addicted and go looking for a better high.
Ho Ho Ho

Yes, they should be decriminalized.
"Your emotional state is not my responsibility." – Warren Smith