I didn't get this article at all. None of what she describes sounds like any pot luck I've ever been to and I've been to (and hosted) tons.
A pot luck is normally a reasonably manageable number of people/families (200? No way!) who bring prepared dishes to share. Everyone plops their dish on the table with a minimum (if any) amount of prep on the scene and within 15 minutes of meeting time, we start eating.
Cooking meat? Asking vegetarians to grill burgers? Volunteer shifts?
Never heard of any of that.
The biggest pot lucks I've been to were when my kids were cub scouts. End of year Pack pool party involved about 30-35 families IIRC. And yeah, people would bring fried chicken from the Popeye's down the street from the pool. And storebought cookies. And much more elaborate stuff too. But no one seemed to mind. There was tons of food and nobody went hungry. And no one cooked, grilled or volunteered to work. We all just pitched in. That's what a pot luck really is.