I wasn't going to expand on my last short comment, as we've been round the houses on this one before on this forum! I have, anyway. Oh well!
I do think Leibovitz's work has the power to make connections, to make you stop and look a little further, think a little bit. Maybe not all of it, but as has been said, a lot of her work is editorial and that would not always have been the prime purpose.
I also saw a documentary where she spoke of her difficulty in 'making connections' with people she is photographing. I had a slightly different take on what was being said - I thought she was being honest and even self-deprecating, certainly willing to investigate the complexities and pitfalls of photographing people.
I do certainly think there is more to her work than the fact that she was in the right place at the right time.