I'm sorry, do you mean the ONE member of staff "having to prescribe water on medicine charts to ensure patients got enough to drink". Doesn't that strike you as a one-off since it was just ONE member of staff rather than the hundreds you would ave us believe otherwise?
I'm not saying everyone's perfect, but the reason anyone would be left without water is because they are considered able to reach it themselves. And there aren't enough hours in the day making sure everyone hits their quota in regards to water. Furthermore, nurses shouldn't be blamed for it, and you should realise this since you proclaim to be a nurse yourself. If they actually had enough nurses working, and didn't have so many other duties that are obviously more important than water, then incidences would never happen. But they do. It still doesn't mean they are in the majority, and it should be the MANAGEMENT that are made to suffer.
I refer you again to the most sensible woman I've ever had the pleasure of reading: this right here
There are PLENTY of "good" nurses in the world, don't just lump everyone in with people who you considered to be sub-par.
And as ImperialBlether has said, "There are threads every week about teachers who don't do their jobs properly - think of those who say their children's work is mis-marked or that the teacher doesn't seem to like their child." So by your reasoning, I should be insulting your profession to high heaven because obviously every teacher in the world is just out to make their pupils suffer. 
I've tried to steer this back to the OP several times, but all Wamster seems to want to do is nitpick. So I'll say this again: I believe that people should do what makes them happy in life and pursue something they are passionate about, rather than doing something they don't like, ending up in a job they'll despise and which will result in their spirit being completely crushed. If you're passionate about art, don't go and do a degree in medicine just because the end result is you'll be paid more. Because as far as I'm concerned, money can't buy happiness.
Does anyone agree? Disagree? What are your views on "useless" university degrees?