as a nurse, i would just like to point out that washing and feeding patients are NOT "menial tasks". Giving a patient a wash can give you so many clues about them, how they manage at home and make a connection on a human level. In fact to some, these are the most important tasks, rather than menial. Now that nursing is an all graduate profession, people are right to point out it excludes some people who were just born to be nurses.
In the NHS, my motto has always been "the more things change, the more they stay the same" It seems to me that we are just (or need to) moving back to the situation of some years ago where you had RGNs and ENs (greenies) - ENs were less academic and more focussed on nursing tasks and the individual patients, wheeas RGNs did the more complex treatments and had a more of an overview about a ward,rather than individuals.
Anything too complex (ie blood drawing lol) was done by doctors. Even at the beginning of my training in the 90s, it was very rare for nurses to be able to take blood (meaning you had to call an SHO from A and E or their bed if someone needed blood taking in the middle of the night) Further back than that, nurses never even used to give IV drugs, that was the domain of the doctor.
So in summary, the nurse's job has increased a huge amount in recent years, with nurses taking on more and more things that doctors used to do, meaning that some things have had to slip down to healthcare assisstants (like washing and feeding, which as tasks, don't take a lot of skills) However the skill is in knowing when that is important to do, and when you can ask someone else to do it.