Red Veg

I donn't think it's down to what you can/should grow but what you want to grow? If red vegetables don't suit your taste preferences, don't grow them. To me 'taste' is everything with stuff I grow, that's what I feel I gain from home/allotment produced stuff.
I did experiment with 'reds' once with the idea of incorporating them into a flower border. Red Duke of York have red foliage as well as red tubers and are reasonably pest free.
I just wonder whether it's the chlorophyll in green veg that the pests prefer?

Generally I do agree though that red leaved plants are less pest prone.