Is the fifth question "When did you stop beating your spouse?"
As I've already mentioned, my take on the matter is that in real life, Barbara Gordon would be walking again if the medicine and/or technology existed or if she had the means to create it herself.
In fiction, however, I think there is much to be gained by telling stories about a superhero who has a disability. I do appreciate that there might also be value in seeing such a fictional character find/use/create that technology or medicine herself.
I honestly don't know what's 100% right.
My gut tells me that if DC decided to fix Barbara's spine, they wouldn't be able to resist the nostalgia factor of getting her in the original Batgirl suit for a bit, and the whole thing would probably find a way to be condescending, ableist and sexist. It also tells me that if she regains the ability to walk permanently, then we can say goodbye to Oracle and to this kind of story.