St. Augustine famously said we my use all things, but only God may be enjoyed. It’s a commonly misunderstood aphorism.
All things may be used inasmuch as they aid in our enjoyment of God. If anything detracts from our enjoyment of God, that thing is being enjoyed and it is detracting from our enjoyment of God.
The “enjoyment of God” is rather abstract, though. I propose something a bit more common. A thing is genuinely useful if it makes church more enjoyable. A thing is useful if it makes church seem more necessary, more glorious, more sublime.