It all depends: if your pastor is a "strong pastor", then what he/she says goes regardless.
If your pastor is not a "strong pastor" (e.g. if they were voted "in" by a board of officials) then he/she may need to go through the board for approval.
That's what I was thinking. What kind of church is this where the pastor can just start a choir. Starting choirs isn't in the pastor's job description. Now if it's the kind of church where the pastor "owns" the church...then I can see the fuss. If it's the kind of church where the pastor got hired (and can get fired)...or the denomination's higher conference/committee appointed him to that church (and he can be removed)....then
put him in his place in the most Christ-like manner possible

Where my father plays the organ, the only thing the pastor would ever say to my father about music would be a compliment. If he ever has any
recommendations, he would never go directly to my father, he'd talk to the minister of music who ultimately makes the decision. But then again, when my father had his interview before being hired, the pastor (who was one of many on the committee) didn't say a word...because the same committee that hired the pastor hired my father...LOL
but different churches have different hierarchal structures and ways of doing things...