IMO they will eventually get what they want, because you can’t counter-argue any of those points with the bulk of the public.
The way you counter those points is when you advertise Big Macs will have to go up to $10 a piece!
You don't have to out argue them. The bulk of the public may agree but will still eat at whatever fast food has the cheapest prices with the food they like best. Big labor can't use these tactics to shut down fast food and with the current House in Washington they won't get it done legislately either.