Hi:
I am not a nurse..yet!

However, I do have several friends who are nurses, and I think it all may depend on where you work, and if you specialize in a certain field of nursing that you find to be fulfilling, etc.
The nurses I know all love their jobs.......one works for a private group home agency, another two for hospitals, and another at a clinic. I think that if that is really what my child wanted to do, I would be supportive because even if she/he decided that working in a hospital was not what he/she wanted to do, there are so many options available, whereas, with other degrees, you have more limitations on what you can end up doing.
My brother graduated with a Master's in Education, and is now working with developmentally delayed adults after seeing what "teaching" would really entail, my fiance is a lawyer who wishes he went to school to be a doctor, and my other brother who also has a bachelor's in education, is not working in that field either.
No matter what occupation/job, your child seeks to do, it is their life ahead of them and he/she may change their mind at some point anyway........if she/he really feels strongly about nursing, then it may be best to be supportive; after all, he/she could change their mind at some point anyway, and at least with a degree in nursing, there are so many options available that he/she might not end up wanting to be a hospital nurse but find another niche in the profession somewhere.
Prior to nursing school, I worked as a paralegal and made the same, if not more, money than I will upon graduating and working in nursing; however, I have found that since nursing is what I really want to do, I regret not having done it sooner. The only other jobs that I am qualified for outside of law, which I have no interest in any more, are secretarial/clerical. If I had a degree in Nursing, I would be able to do many more things, even if it didn't deal with patient care directly.
Perhaps you could encourage your child to go for a Masters or Doctorate which would also allow for much more autonomy and also increase options for the future.
Just my 2 cents...
Carla