Why do nurses in training continue to draw on the ideal of compassion when responding to their experiences of nursing work in the UK National Health Service (NHS), despite the difficulties that they face in developing compassionate, long-term relationships with patients in practice? To answer this question, we draw from a psychosocial analysis of focus group data from 49 trainee nurses in the NHS. First, we show how this ideal leads them to blame qualified nurses for failures in patient care. We suggest this is an unconscious defence against the anxiety evoked both by the vulnerability of their position as those who need to gain access to the profession, and of being unable to conduct compassionate nursing work. Second, we emphasize that less powerful occupational groups, such as trainee nurses, may adopt defences that underpin dominant organizational policy, such as idealization, despite further disadvantaging their group and benefitting those in power. We conclude by questioning the particular emphasis on compassion in nurses’ training, which can prevent occupational solidarity and the ability to reflect on the structural and organizational factors required to conduct patient-centred nursing work.