It's an efficiency tool. Does every single one of your meals have to be "the best meal ever" where everything is made from scratch from ingredients you sourced yourself from the farmer's market? Of course not. There are definitely times where you don't care to enjoy your meal and just need some nutritional sustenance. Traditionally in those cases your options were fast food, or maybe some kind of protein bar. Soylent is a better alternative in my mind to those.

One pleasant side effect of the "blandness" is that it has made me really enjoy the meals that I do eat. I've noticed that the flavors pop a lot more. So now I have the best of both worlds.