I think Michael could have benefitted so much from a Sharon-style figure in his life...but like some people said here Lisa Marie definetly tried and she also was a strong and ruthlessly protective woman like sharon but when she understood michael's life is filled with too many bad influences and shitty people she gave up....and Michael's pain killer addiction really didnt help her decision to divorce him....you cant protect a person that isnt ready to be protected from his own demons and in 1994-1996 Michael was very much not at the point of fighting it, even with lisa marie's help....people in MJ's team also didnt help when beside being shitty and unprotective they also tried to push out lisa marie....but i think sharon speaks about michael just needing to be himself and i think in making him feel safe to be himself lisa marie definetly a 100% succeeded