As a nurse, you don't give too much medical advice to people. Its against the rules. If you don't feel like you could refrain from proselytizing on the job, then yes, I would say nursing is not the right choice for you.
YOu basically will be working every single day with doctors, and following their direction, yet, you call them "greedy cheaters". Not a good way to start off, would you say?
If you want to help people, and don't mind being around blood, urine, feces, mucus and vomit, and don't mind helping people with bedpans, bathing, etc, then you might be cut out to be a nurse.
Nursing is a very hard, very under-respected, but often very rewarding job. My mother has been a nurse for many years, and the above line is what she gives to young people looking into that career (including my sister), because sometimes people don't realize everything the job entails. But, if you don't mind those things, and have a deep rooted wish to help people when they are often at their most vulnerable state, then it is a wonderful profession full of many rewards. I can't walk anywhere around our town without bumping into someone who recognizes me (because of our family resemblance) and tells me what a wonderful nurse my mother is, and how she helped so much with the delivery of their baby, or how she taught a woman having trouble with breastfeeding, etc. Good luck with your decision!