Nonsense. I have been using a power steering rack without the pump from day one in my car.
Disadvantage is that it is somewhat harder to turn when the car is stopped or very slow but it is NOT that hard. Heck, my grandkids can handle it, for goodness sake.
Advantage is that it is a quicker steering rack than the manual so it is more responsive on the track.
I would not ever go to a manual for that reason. I believe it gives better feel as well.
Man up and get used to it. You will not notice it after a day or so.
Big Dog