My justification for using was 'if I'm not on it, chances are I'm going to kill myself' - it seemed like the better alternative. Truth is, I'd convinced myself it was the only way I could get through life from then on, so then my options were either kill myself / stay on smack / try and get help when I wasn't even ready to stop.
I think for some there just comes a time when enough destruction is enough.
If it were completely regulated, pure, no criminal element, not illegal etc then I'd say sure you're entitled, it's your life - you'll avoid 90% of the shit that comes with heroin addiction as it is currently under prohibition - but until then, fuck it, there's always codeine if you're that desperate, and it's cheaper, you probably won't die, and won't have to deal with as much seedy underworld.
Even when anthrax spores were doing the rounds in the H in my area, I still went out and bought on the street, because that was my mentality - we're all gonna die, fuck it if it happens tomorrow, I wish it would already.
It took a HUGE shift in my perspective to finally see what I was doing to myself, the people around me and what really mattered to me in life, where I would end up if I kept using the way I had been.
Whatever trauma you've got, can be dealt with in other ways. That shouldn't be your reason, but hey, if you can afford it, it doesn't ruin your life to any degree, you trust your sources, you know how to practice HR, use sterile ROAs etc then yeah you're informed and less likely to suffer. But you probably will still feel isolated and shit about yourself.
What is there to gain besides a letter in the post telling you you're going to wake up sick the next morning, again.