Isn't that what sound crews are expected to do sometimes? Take the hodgepodge produced by the worship team and make it sound like a professional recording?
Often the vocals are a tremendous challenge because many volunteer teams consist of varying levels of talent. Yes we have options like pitch correction, reverb, eq, compression that can do a decent job of hiding weaknesses and showcasing strengths. That's all well and good but we can only do so much with the sound presented to us. We may spice it up a little but it is only as good as the musicians making it. The better the sound, the better the mix we can present. Being a guitarist I have learned that hyper-processing signals can kill tone anyway. Don't get me wrong, I like me some effects but I shoot for more of an organic sound. The more skilled the band is, the less challenges there are.
And vise-versa. I have caught myself thinking "Whoa, there is nothing I have here that can help that sound." It's true. There is no button, dial, fader or effect on the planet that can help a musician who lacks the talent to actually play the song. Hence the sow's ear. If the bass player is playing the wrong notes, it will throw people off. If the singer can't actually hit the notes, the rest of the team loses confidence in the sound they are producing. So what do we do?