The idea that letting an addict feel the pain of their addiction IS A SIGN OF LOVE is foreign to a lot of people. I no longer try to explain it to anyone else.
It is possible to maintain enough contact with your parents if that's what you want to do for your own peace of mind - i.e. dropping a note once in a while. I'd avoid engaging in the right or wrong argument, too. As an adult, I am permitted to lead the life I want as long as I do no harm. I don't see where you are harming anyone when you choose to live the best possible life for yourself.
((()))