What with a smoke monster security system it seems to do fine on its own. Just kill everyone who comes aboard...pretty much what it does most of the time anyway. In fact adding any human elements seem to complicate it exponentially.
The protector doesn't seem to have much a job other than finding a new stooge to babysit the magic butt plug. He doesn't perform any maintenance, he doesn't routinely fill the gas tank, he doesn't even feed the monkey.
So why?