Nursing, just like many other social oriented professions, attract a lot of people for the right reasons, like wanting to help other people, yet too often that well-meaning motivation is then exploited to the maximum by overworking and underpaying these people.

They will bear a lot of that, because these people care for their patients and leaving a job because of bad circumstances also means leaving their patients behind with those bad circumstances.

Which is not something that comes easy to everybody who makes "helping others" such a big part of their work motivation.