I think you're being humorous, but it's also interesting, as I seem to see it a little differently.

Mary's career in showbiz has not had the highs that Diana has experienced, but she is a seasoned performer, and somewhat of a late bloomer. In the earlier years, she didn't have the overt confidence, the vision, and the consistency to make hers an exceptional career much earlier in her life, except as part of a very famous group. That is true of almost all of us, in all walks of life.

I think Mary watches Diana as an 'older sister' figure, and has learned a lot, most significantly from her own efforts.

I always felt that, of all the wonderful female talent at Motown, Diana's strongest competitor within the company was standing right next to her on stage. Diana knew it, but Mary didn't.

That doesn't justify rewriting history, and it's always too late for many things for all of us....but that's just the road we took, to reach where we find ourselves today.