It could be great to be so completely in your comfort zone academically so that you can focus on other things in life. Also, getting all 8/9 grades does not necessarily translate to A/A at A levels. DS's GF got excellent GCSEs, all A/A, but struggled at A level and got ACD. She wanted to do medicine and decided to do a Biomedical Science degree , which she is supposed to be starting in September, and apply for medicine as a graduate, but has recently come to realise that it would suit her better to do child nursing. She is trying to switch but she has enough points for adult nursing and not enough for child nursing.
If she had started by being more open minded about various healthcare roles, she would have had an easier time adjusting her expectations. She could still do medicine as a nursing graduate if she wants to.
As Piggy said about the girl who wants to be a nursery nurse, a mental health nurse who is strongest in his/her cohort has a good chance of getting the senior roles later on - I have a nurse friend who is a nurse practitioner who runs her own clinics and is well paid.
@ealingwestmum actually for nursing there is a lot of public funding support - in Wales you do not pay fees if you are willing to work for the Welsh NHS for a few years when you graduate, and the govt give a £5k-£8k annual bursary to all nursing students (£5k available to all, extra £3k dependent on family income) so nurses do not have to graduate with much debt.