Not to an addict and certainly not to their loved ones. See, you are on the one hand saying the addict is fine doing whatever it is they are, and on the other hand you are shaming the loved ones of the addict into a position of never giving up on him/her.
All of that will just make things worse for all parties. You see, the addict, after a point, does not really want love anymore. They want the substance. They may use love as a tool to live and continue their addiction but they are not in a condition to provide a reciprocal relationship. They have become, in a way, narsistic in the sense that other people are above all enabling agents to get their high, and beyond this utility are worthless to them.
So you see how just being ready to love another through whatever is not actually a great plan when heavy addiction steps into play?
First rule of all human relationships: You are not responsible for another person - their happiness, their addiction or what ever.
Some relationships can be actively harmful. Especially with addictive substances the other party gets easily damaged through co-dependency.