Writing Advice: What Would You Do When Your World Made No Sense?

I sometimes help authors research stuff on Reddit, and recently, someone came to us, wanting details of what goes on inside a slaughterhouse, i.e. where animals are killed and processed for meat. Apparently the MC is both deficient in vision (can't see ****) and mind (delusional) and thinks there are prisoners inside the facility. So at night, the MC, with some homemade weapons, managed to scare away the staff and was about to release all the animals, and he wants to know what's the most efficient way to go about it. 

I told him that what he described is IMPOSSIBLE. There are NO holding pens "inside" the facility. The only time a live animal (single) enters the facility is into the kill box. What one considers to be "holding pens" are moveable swing gate barriers on the OUTSIDE of the facility, and those don't hold any animals overnight. They are built to create a line where animals can be paraded and bid on by buyers as they are unloaded from transports leading up into the kill box. There's nothing to release. 

This gentleman's response? Can be summarized by a quote from ex-Mythbuster Adam Savage: "I reject your reality and substitute my own."

Then I told him about part 2... Any staff who escaped is going to summon law enforcement, and they will summon the county SWAT team, mutual aid from all surrounding counties, plus bigger guns from state police and any Federal teams that may be available nearby. How is your MC going to deal with that? And don't count on the animals stampeding their way out creating a distraction. Modern farm animals are way too domesticated. They will NOT leave and prefer to stay with the herd. If you open the gate, they won't go anywhere until encouraged to do so. 

At this point he's basically ignoring me. Which is fine. The advice is free. If he wants to create whatever fantasy slaughterhouse for his own reality that's his problem. It simply doesn't conform to OUR reality. 

If he had asked something like, "uh, I'm trying to achieve X, how do I go about it? So far my ideas are Y, Z, and W..." I would have told him what can be worked on, and what wouldn't work. However, he's so married to this idea that he'd rather bend reality than accept this idea wouldn't work. 

Chief Takeaway: Don't be so married to your ideas. When they don't work, they don't work. Save it for something else, or rework the idea.