I struggle to think of any career path where a formal qualification in music performance would be an asset, particularly as (as I understand it) you don't play an instrument and you'd be relying on vocal performances.
Irrespective of whether you were seeking to join a pop group, a professional choir, a group of session singers or whatever (or to become a solo performer), I can't see how having a piece of paper saying that you'd studied the subject could help you in any way. Your ability to make progress along your chosen career path would be determined by your actual performance skills (together, possibly, with associated talents, such as song-writing).
If I recall your previous posts correctly, you might also not have any/much relevant experience in areas such as transposing music into different keys. Without such experience you might struggle on a course dedicated to music performance.
To some extent, succeeding in the field of professional photography might also be more reliant on what you can actually do, rather than on any formal academic achievement. However if, say, you were seeking a job with an advertising agency, being able to say that you'd got a formal qualification in photography might well enhance your job application.
To be honest, I find it hard to understand the academic rigour of a course in music performance. (i.e. I can't see what it is that you'd actually be studying). I suspect that many employers would also wonder what a qualification in music performance was actually about. However, as someone with an interest in photography myself (and a former member of the Royal Photographic Society), I can see that there's a great deal that can be studied on a photography course.
If it was me, I'd definitely be opting for photography but, as I wrote on one of your previous threads, you really need to be thinking about what you'll ENJOY most. If you're bored rigid during every moment of your course you'll probably end up dropping out of it anyway.