First of all, this is discussion about people eating too many calories from bad food. Bananas probably beat most of the snacks otherwise discussed.

And protein deficiency? A 70kg male needs something like 55g of protein (WHO figures) unless they exercise. You are not going to go below that unless you fill a substantial chunk of your calorie intake by eating pure fat.

I eat a plant based diet and weigh about 67kg. On 2500kcal I get about 95-110g of protein, and that is without trying. Had I been a meat/milk eater, this number would have been higher.

Protein intake is generally a problems if you are either starving or very serious about building LOTS ofta muscle.

Valid. Bananas are however very high in potassium, moderately high in Magnesium and dietary fiber.