Why do people use help dogs?

I like the Question Levi... I've wonder as well? CULL or HELP Dog and why do i need one? MY dad is over looking at my dogs couple weeks ago,he's 77 and says " When me and your grand dad use to hunt rasorbacks, we use redticks to bay'em up and all the cur dogs did was follow the hound and chew on the hog till we got there"....... Now after i picked myself up off the ground because in my 44 years only hunting my dad did was from from a deer blind!!. We discused how they hunted and what i got from it was the number of help dogs you want or need is dependent on how big a hog your trying to catch, So can a strike dog and catch dog shut down a real rank big boar, or would it be better to have a strike dog,2 rough help dogs and a catch dog to get the job done?? Oh yeah now after more hunting and fishing trips than i can remember with my dad, I find out I'm a third generation Hogdogger and didn't even know it!!!