In fact most people who take heroin started on painkillers.
Almost all addicts drank milk as babies, maybe all of them. Correlation is not causation.
There is a really interesting series on Netflix called 'the pharmacist' . It starts with a murder and leads to a Dr who is prescribing oxycontin to anyone who turns up at her office.
It ends with the bankruptcy of a drug company.
We have a different set up in the UK, I can't imagine a Dr here opening late at night and a queue out the door for prescriptions.
We don't advertise prescription meds to the general public.
I have Arthritis in every joint, occasionally in my eyes and a few other health issues. I take Tramadol daily but I am careful to not overuse because I cannot afford, in terms of pain, to be addicted.
I take other meds and use a TENS machine, hot and/or cold therapy, I'm always in pain but not agony.
I'm not saying it doesn't happen, but I think in the UK we are more careful.
I don't think anyone wants to return tot he days of valium in the 1970s.