You are right, in that it is a very challenging and emotionally draining field. Patients can be manipulative, demanding, difficult to engage with. Often with significant mental health needs. That work is not for the faint of heart.
However- WOW. "They are kids in adult clothing." That kind of attitude is like the root of the problem. In actuality, addicts are human beings struggling with an intensely difficult problem that affects literally every aspect of their life. These patients lives are in complete shambles, and their neurochemistry is permanently altered by their addiction. It is a loong and painful process to recover. It is soo condescending to dismiss their struggles by comparing them to toddlers.
You ask WHY they got addicted. Well. In large part it is OUR FAULT, handing out opiates like candy and leaving our patients dependent.
Other factors are extreme poverty, untreated mental illness, abuse and neglect as a child. I guess some people might just decide to take up meth for fun, but... i think thats rare.
And how do we help them? Well. We detox people in the ED then toss them back on the street because there are no rehab beds.
We make them jump through hoops and follow strict rules in order to deem them worthy of medication treatment or a community residential placement.
We deny them housing if they can't sober up, and throw them out if they relapse. In some states pregnant addicts can be thrown in jail.
To this day it is still easier to score an opioid rx than it is to access treatment. We require providers to take special classes to provide MMT, yet anyone with an RX pad can write a big old bottle of dilaudid. We make patients come to US, instead of reaching out into the community.
Listen, no one enjoys being homeless and alienated from society, covered in sores, trading sex for heroin. Like, nobody. Lets give them some grace, and some help.