At least in the parents posters mind that less farm exports leads to less water usage. Hence bankrupt farmers solves things like aquifers going empty and lakes draining leavings environmental disasters.
Now, how it actually works out in the end may be different, but the concept doesn't seem completely broken at first appearance.
I would presume that this is true, in the sense that the overall economic footprint of what these bankrupted consumers eat will be smaller.
The caloric difference will be insignificant. But instead of having it come from meat, and especially cattle, have it come from vegetables and poultry.
No one needs to eat red meat every day.
Why the personal attack?
The top level comment didn't claim that it would solve the water problem, but that it would solve some apparent problem with Utahns but being able to buy alfalfa. Now another commentor is saying that it'll solve the water problem by putting farmers out of business. Is there a local unmet need for alfalfa?