Lots of well-meaning people think that offering rehab to addicts is some type of magic cure. Unfortunately, the average addict has to go through rehab 7 or more times before it 'sticks', and the cost of providing rehab to anyone who needs in it a country the size of the US is about as unrealistic as an AOC economic plan. There is literally not enough money in the federal budget. I think of lots of well-intentioned middle & upper middle-class folks who have never done a hard drug in their life imagine addicts as desperate to get off the drugs. In fact, tons and tons of addicts are at least moderately happy with their situation and not really looking to change. And/or, they enjoy the street lifestyle more than their likely other option of a boring, low-wage life of 40+ hours a week. Source, have tons of family & friends who are lifelong addicts, and I did plenty of hard drugs recreationally myself in my misspent youth (now many years in the rear view mirror).
While I am no fan of the War on Drugs, the Portugal decriminalization story is the classic fallacious argument I see a lot on the left- 'let me compare this tiny culturally homogeneous country of 10 million people to your wildly diverse nation of 330+ million'. Solutions that work in tiny countries often don't scale, and the US is simply culturally different than Portugal around drug abuse.
As a thought experiment- opioids are legal with a prescription in the US, and also kill more Americans every year than died in the Vietnam War. Let's imagine instead that no prescriptions were required, and for the last 20 years anyone 18 or 21+ was able to walk into a store and buy Oxycontin directly off the shelf with zero restrictions. Do you think the death toll from opioids would be higher, lower, or the same than it is now? It would (obviously) be even higher. Americans really enjoy getting extremely high. That's great that people in Portugal appear able to resist the temptation of cocaine/heroin/meth/whatever, but that is clearly not the case in the US.
While I do support more money for rehab and other anti-Drug War policies like federal marijuana legalization, the sad fact is that there are no solutions whatsoever to widespread hard drug abuse. It's a part of American society that's not going away anytime soon. Rehab for everyone and complete drug decriminalization are unfortunately not realistic policies