The biopsychosocial model is quite actively used to disempower patients; just look at how it is used to justify welfare reform in the UK. Allowing people to claim expertise and authority over the psychosocial aspects of people's lives just because they suffer from ill health will always lead to abuses of power.
The notion that people's cognitions and behaviors should be 'managed' in order to promote particular outcomes keeps leaving patients feeling manipulated and mistreated.
In addition to that, many of the claims for the efficacy of biopsychosocial interventions rely on the non-blinded trials and subjective outcomes that have been used to promote quackery like homeopathy. Time to leave it alone.