Some people are music snobs --and they won't sing anything low-brow.
Some people are music cretins --and they won't sing anything high-brow.
Some people are music curators --and they won't sing anything new.
Some people are music dilettantes --they will not sing anything old.
We ought to be none of these things. We ought to sing whatever we are given to sing (as long as it's Biblical) with full voice and heart. Does God deserve anything less than full-throated praise?
And, we ought to be a bit of all these things: we ought to sing high brow and low, old and new.