Can any one explain to me why some people feel that nutritious food is expensive?

It’s not. Broccoli, cauliflower, strawberries, lettuce, potatoes, beans, almost every thing is very inexpensive per serving. Sure, buying high dollar food, like salmon, makes each serving more expensive, but it doesn’t automatically follow that it’s better for you The cost of food depends on its abundance, not on its nutritional value.