Why all the subjects as per UGC NET subjects applied in SLET?

Dear All

Why all the subjects as per UGC NET subjects applied in SLET?SET Exams too. I’m a candidate who studied MBA with HR specialisation. and keen interested in appearing and passing SET Exams of West Bengal or Karnataka SET but to my bad luck these states don’t offer the subjects which I studied.
Can SET/SLET conducting commission has an answer for it or any options can they offer.
Regards!