Except that's not Homura.
People are defined by their experiences and their environment; Homura and Kyouko would be very different without their personal tragedies, but that doesn't make one version less real than the other.
A separate rant, I forget where I've seen people say that MR is less "good" than PMMM because the stakes aren't as high in terms of max achievable despair
Tragedy must be dosed carefully, or it becomes hard to take seriously. I remember a lot of people complaining about Nagisa's story being too dark, what with the awful family and the serial killer.
Even so, a game like MagiReco can't really afford to off too many characters (in theory).