Wouldn't pyschosocial factors play a role in pretty much all illnesses and pretty much all of interactive living?
How is this vague statement in any concretely useful?
Of course for those who make such lame statements it's because they wish it to mean 'take your CBT/GET medicine and stop whining about the bio part.'
Again, using the phrase 'psychosocial factors' is a code for them but in reality (where the rest of live) it is a vague hand-wavy thing to say and can rightfully be applied quite broadly.