YippieKayakOtherBuckets
Because anything can be used as a stick to beat staff with.
E.g. An English teacher with a Bsc Lingusitics and Psychology has BSc next to their name but a literature specialist has BA. People without enough knowledge of the subject decide the person with a BSc mustn't be a specialist.
Someone has a BA Psychology but does a subject knowledge enhancement course for science, but a BA in the science department 'means', to some, that teacher isn't qualified enough.
Someone does an MA in an obscure area unrelated to their curriculum, but has MA after their name so people assume that makes them a 'better' teacher.
Without knowing the differences in teacher training routes, an external observer decides their child's teacher 'only' has a BA(hons) with QTS and their year partner teacher has PGCE so the one with postgraduate teacher training must be the better teacher.
A school appoints an English/Maths teacher who trained to teach in FE, they are happy with 15 years experience the teacher is good (and especially good with students with low literacy and numeracy at ks4) School is happy to put their new member of staff through assessment only QTS. Someone decides that the teacher mustn't be any good because they haven't got a PGCE.
There shouldn't be a need to publish staff qualifications and I'm not happy about yet another stick to beat staff with.