GaruuSpike 
Emotional support birb
I mean, it can be. Depends on what you put in it. Meal Replacement smoothies are a thing; put in lot of protein, fat, and carbs, and you can rack up 1,200 calories of good stuff.
What doesn’t make a meal replacement smoothie is fruit alone. Sunny needs to put in some heartier ingredients like Greek yogurt, tofu, nut butter, chia seeds, oats, dates, pumpkin puree, greens…