right hand only hold

I noticed in Sharon's latest video lesson that she was holding the harp one-handed with her right hand as she played through the first three choruses of "Temperature". I assume this is acceptable in lieu of using a left hand only hold. I have a damaged rotator cuff in my left shoulder which surgery went as far as it could to fix, but using a left hand only hold causes me pain. I have much less pain there when using a 2 hand hold, but it is still present. I have a series of rotator cuff specific dumbell exercises recently give to me by a physical therapist so I expect those to help eventually., but in the meantime is there any reason I shouldn't utilize a right hand only hold on the harp while practicing?

Thanks,

Greg