>>149545280
Cass no-life-ing it as a vigilante was a problem, but she and Damian were never going to be normal. Cass was trained from birth to handle the physical part of being Batman and powerfully by deep guilt from the murder she committed as a child, so she was uniquely suited for being Batgirl.

Steph, on the other hand, ran in to Black Mask in War Games, so I don't think any damage was mitigated.