I don't "love" singing, but I played in quite a few bands where I was required to sing harmony, and, I learned very quickly that you have to have more than decent vocal abilities to support the lead singer, if you are going to do a good job. It certainly helped me achieve a good enough technique to manage backup singing a lot better. Another benefit was that it helped me croak out the melodies to tunes I had written/arranged well enough so that the person who was to do the actual vocal understood how it was to be interpreted.

One group I played in had three backup singers, a guy and two gals, and they were all technically better singers than the lead vocalist, but he had better stage presence and delivery, and, as Donny said above, exuded confidence in his abilities....hence he sang the main vocals.

Ian