Magic Johnson has enough celebrity status, that he would be a good promoter of AIDs awareness and prevention. Since he has been HIV positive for a number of years, in some ways, just being in the public eye is a promotion. There are so few people who don't know his HIV positive status, and to see him doing so many things while HIV positive raises awareness.
I believe Magic Johnson has done a lot in the field to promote AIDS awareness and prevention. Furthermore, his story probably did a lot to mitigate this problem for many people, but I do not believe it should be his life long goal nor do I think he should feel forced to work in that field for the rest of his life. He has done enough, he should only do more at his will.
No person can sit and say that Magic Johnson should or should not be more proactive in promoting awareness of his disease, because even though he has a long history with the disease, he can do what ever he chooses, and he should not have to follow what the public thinks.
Magic Johnson has already done enough with regards to AIDS awareness and his HIV diagnosis. He's still alive and still thriving despite having the disease for decades. Johnson has just as much right to focus on his own life of owning businesses and taking care of his family. He shouldn't have to make AIDS awareness his life since he seems to be doing well living with the disease.
No, Magic Johnson should not be more proactive in promoting AIDS awareness and prevention based on his history and HIV-positive status, because Magic John is already a very high-profile person for the cause of AIDS. He does a great deal for the cause. When most people think of AIDS they think of him. He gets to have a private life every once in a while.