Nonsense. The only thing that a good hospice nurse needs to have is a passion for her patients. It is a calling. It used to be that nurses often went to hospice at the end of their careers because they wanted to be off their feet. That is not the case anymore. Hospice is it's own specialty, and what with budget pressures on hospices like every other healthcare entity, hospice nurses have larger patient loads and more acute patients. We have many patients in our hospice with TPN feeding, feeding tubes, respirators, LVAs and every other thing. Maybe it was that way long ago, but hospice is no longer a place where you can work short hours and stay off your feet.
We have had several very young nurses in our home hospice. Many have not worked out, for whatever reason, they have moved on. But the ones that have stayed are excellent nurses and are much loved by their patients. And every older hospice nurse will tell you that many patients perk up with a young person in the house.
I would stop your self doubts and throw yourself into the experience. You will know whether it is right for you, and that will have nothing to do with whether your colleagues think you are too young.