Motif? Your motif for this is what matters, to support a friend or family member, absolutely, make sure it is an open meeting and not a closed meeting which is only for alcoholics or addicts. Just out of curiosity or to people watch, probably not, going into a field such as counseling or social work, maybe. Looking for some support for yourself, look online, there are 12 step meetings for many issues.
Attending an open. Meeting may teach you a lot about yourself - even if you are not an addict.
Not unless.... ..You go there to be disruptive, or to make fun of people afterward. If you go to learn something about what life is like for people with addictions, that is a good aim, and nothing is wrong with that.
AA. Sure. Helps u learn the concept & socialize.