Mia,
Pretty much since I started going to rehab last July (my accident was in Feb) all my health care providers have been preparing me to accept that my recovery will not likely be 100%.

Everyone from my physiatrist, rehab nurse, my rehab psych, definitely the neuropsych and most recently my physiotherapist. Its all been the same story, but of course they all deal with slightly different aspects of my not returning to my pre injury self at 100%.

Some days its hard to hear but most days I just try to remember that no one ever stays the same, everyone is ever changing and growing and that this is just a phase of rapid change and growth for me.

While they tell me I won't ever be 100% or back to my pre injury self, I also don't let that hold me back from trying or at least working hard to get better and figure out ways to cope with whatever is giving me a hard time at the moment.

Doesn't mean it doesn't bother me sometimes, depress me sometimes, irritate me, etc... just trying to wrap my head around it and move forward from where I am.

So while I can't say why they are saying it your case, all I can tell you is that they've also said it to me. You're not alone.
Starr