Why do people use help dogs?

Well as for me....I have 2 dogs, that's all I want. One is a strike dog, the other a help dog...I like 'em both and can kill hogs with them alone. They both hunt hard and are close/medium range dogs. The help dog goes just as far as the strike dog and has found a hog on her own, but just doesn't do it regularly. Sometimes they're together, sometimes not but either will set the woods on fire getting to a bay and both will catch if they think they can handle it. I don't have the ability to hunt hogs every day I want to, just don't have that many around where I live, therefore I can't hunt enough to have all strike/find dogs, wish I could but I can't. You guys that have hogs right near you that you can hunt daily are sooooo dang lucky, thank the Good Lord tonight for that resource, wish I had it.