True, but good thing is that non-vegetarians also eat vegetables, non-veg items are just a part of their total diet, I am not aware of any significant negative health effects of fish if cooked with little oil.
I was watching a TV debate on malnutrition among children in rural areas, one participant argued that increase in use of pesticides in water-logged paddy fields has reduced availability of many small fish species that were a traditional source of protein for children in rural areas. As a doctor don't you think little bit of fish, occasionally home grown chicken or eggs, etc. would benefit less fortunate children who don't get many other nutritious foods apart from insufficient food grains and pulses distributed through PDS?