Why should a non-professional choral singer take singing lessons? For the same reason someone who plays tennis or golf or any other sport takes lessons or buys good equipment: so that you can do it "better."

If you sing, you are a vocal athlete. If you sing with a good technique, you can access more of your vocal potential, which will allow you to contribute more effectively to the ensemble. Mindful, healthy singing also will enable you to sing well even as the effects of aging begin to impact your voice. And as for vocal health, the better you understand your instrument—how it works for you and how to keep it safe (when to rest your voice or when to not sing at all, for example!)—the better you will be at avoiding the vocal injuries that can plague choral singers.