I don't want to be stuck in my home base dying over and over because the other team refuses to destroy the core and end the game. Remember that for a Warzone team to have enough coordination to collectively not destroy the core, they likely have to be a Fireteam of 12. If your team doesn't match that level of coordination and communication, you're likely not going to win, and you're likely not going to be able to fight back. Being farmed is just a waste of time, and I usually just quit the game. No point in getting stomped for five minutes (or longer!) when it could have ended much sooner if the farmers had any sense of sportsmanship.
I think some kind of mercy rule could help eliminate farming. Maybe automatically ending the game if the score difference is high enough, or have the core's health sloooowly go down automatically when there's a triple cap. Or maybe have everyone's REQ level sloooowly increase over the course of the game to give the farmees a chance to fight back. All of these options would change how Warzone is played, but what is farming if not an exploit of the existing system?