Only in a vaccuum. It pays far worse than other jobs at the same rate given the effort and stress the job entails.
> don't they get more leverage on what QOL and wages they can demand ?
Sure, but it needs to get far worse. The hospitals are only going to budge once walkouts are organized. But that can't happen without strong unions, most nurses just need to pay the bills which is why they continue to put up with it.
I'm not sure you understand who has the leverage. The hospitals can let healthcare deteriorate far beyond current expectations. They still get paid in the end. The environment for patients and nurses will only get worse.