The stance a professional takes therapeutically is an expression of their personhood. Relational psychiatry is the application of the person-centred method in psychiatry (see egs. previous post and another). As Galbusera et al say:
according to [Helmuth] Plessner’s concept of 'eccentric positionality' – which for him is a defining feature of personhood – we are positioned both within and without our own being and are hence capable at the same time of experiencing the world from a first-person perspective and of taking the point of view of others (ie. the third-person perspective) toward ourselves. Personhood consequently is a category that unifies the dichotomy of individuality and sociality by mediating our individual being with social norms and expectations and vice versa.
Openness and authenticity are necessary not only within the clinical domain but also at a societal level in the treatment of those with serious mental illness as persons (see eg. another previous post).