This is why so many people like myself think Didio was such a horrible thing for DC. This mindview assumes that comics readers and the general populace are dumb, and causes comics to be dumbed down to compensate for the dumbness of the public. DC had maintained a consistency of vision and progression for years beforehand, and was producing higher quality books because of it, and that was thrown out in the 90s.
Complicated backstories are nothing to shy away from. The PAD Supergirl remains not only the longest running and best Supergirl series to date, but it was selling higher at issue 80 than the subsequent Kara Supergirl book was selling at issue 67.