" High fibre brown/seeded bread, oatmeal/porridge, oatcakes etc are much healthier than white bread."
I can't tolerate very high fibre stuff. I'll buy seeded bread if I can find one I like. I can't at the moment, but that's what I was eating in the spring and early summer.
"is opening a packet of salad, sloshing on sone dressing and making an omelette or scrambled eggs really quicker than assembling a cheese sandwich?"
No, as you say (before your second post), it's not quicker, which is why I don't do them. Definitely not at lunchtime, occasionally at dinner time, but I've had to throw away so many bags of leaves that have gone to a mush in my fridge that I'm more realistic in my purchases now.
" It took 5 mins at most to scrub and chop some veg and put them in a pan with a bit of olive oil and herbs and garlic, then to add some water. It will take another minute to whizz them up in a blender then perhaps 10 seconds to add a spoonful or two of plain yoghurt when it's supper time."
It would take me longer than that. I have some packets of soup in the cupboard, but I have to add bread as I can't find thick ones at the moment so it's bread again, then I'm tempted to just add some cheese and I'm back to my cheese sandwiches.
""Please excuse me if this is impolite, but I think you perhaps have to ask yourself why you are deliberately subverting - or at least taking chances with - your future health. Are you depressed? Anxious? Fearful? Don't you want to stay fit and healthy for as long as possible?"
Not impolite at all. I don't think I'm sabotaging myself. I'm trying to get more exercise, for example and I don't drink too much. I want to be healthy, but it depends how much of a sacrifice it is and eating things I don't like 80% of the time is just going a bit far for me, as would be standing up cooking for 20 minutes every day even though other people think that's easy.