It doesn't matter if she's disabled.
It doesn't matter if she panicked.
It doesn't matter if the cyclist should have been on the pavement.
The bottom line is that her intentional actions led to the death of another woman.
This isn't a case of bumping into someone she didn't see and accidentally knocking the other lady into the road.
She didn't murder her, but she is culpable for her death. Given the consequences, a three-year sentence is comparatively light, but I would say not surprising given the complexity and mitigating circumstances.