That's your opinion James, but I heartily disagree. I often use 3 or 4 voices to get a 4 Freshman type harmony. You DO however, need to learn a new skill to operate, trigger and "authenticate" harmony useage. If you don't understand the concept of choral singing or tight harmonies from experience, then the practice of using an electronic "group" will be very hard to relate to.
Believe me ...... I can sell a 5 part vocal group that turns heads night after night.
I grew up singing harmpny because my vocal range was always a little lower than the lead singers on the radio. It taught me to listen "inside" the chords and find just the right balance of tone, diction and dynamics. It's an art form in itself, and it's not as easy as learning to read music. It has to be "felt" and expressed. It has to blend with the lead, without overshadowing it. It's a musical conversation, really.
It's tricky, but it CAN be done. I do it every night.