Selecting just the right key for a song can be tricky, but we have to try. As worship leaders, our chief responsibility is to employ musical elements in order to engage the congregation, helping them connect with the Holy Spirit and worship God. If the congregation can't physically sing a song, it's a non-starter.
It can sometimes take a small army to "make Sunday happen", but what does it look like to "let Sunday happen"? An entire team united in spiritual preparedness is unstoppable.