Why do people use help dogs?

i have a full fledged strike dog always huntin an then two comin up with him i say the 2 r help dogs cuz bones always strikes the hogs an if they r not with him they r on their way quickly but i wouldnt trade either of em for a finished dog the way i see it is they havent started huntin yet they may or may not in the future only time will tell but to me help dogs r dogs that will help the strike dog but not hunt on their own yet i see help dogs as dogs in training ill never buy another finished dog no pride in that ill train my help dogs till they learn that i want them to find the hogs too