I will agree, a fish and chips meal with mushy peas does have some good nutrition in it, unlike a lot of options for fast food. I would contest the value of mushy peas these days, yes there's some sort of nutrition in them but the quality of the product is extremely low in every chippy I go to, so I don't bother. £1.40 for a small pot of dark green liquid with a bit of "peas", no thank you!
My point about treating fast food as a rare treat was that if such food is consumed on just an occasional basis, and not as a standard option in place of good food, then it's not necessarily the end of the world. I do agree that fast food chains like McDonald's should not have such an influence as they do, but it is worth noting that sometimes it is the most efficient option available. If I'm at, say, Reading and I have 20 minutes before my next train then I basically have two options on the station. Burger King or Subway, assuming of course this is at a meal time. Whichever one I'd choose would partly depend on the queue length, to be honest, but there would not be sufficient time to go to a local shop and get something from there first.
Going back to last night's post, the Subway experience I had in mind was in Leominster a good number of weeks back. I'd just finished a 31 mile cycle ride, and needed something good for lunch before I had somewhere to be for a few hours, then I had more cycling to do in the late afternoon. Subway was my best option at that time, especially being on a Sunday. So it wasn't because of being lazy/unable to make a sandwich, I just didn't have the time to go to a shop and source the stuff I needed to make a sandwich.
Otherwise, I generally agree with you. Cheap, mass-produced and low-quality food has been favoured by the masses for so long that good quality food that costs more is not seen in such a good light. Why it's like that, I don't know but it's not going to change any time soon. I definitely agree with Wetherspoons food, let's not discuss the poor quality meal my Mum had when we went there earlier in the year!