What's missing in the blender consumption of food is chewing..... one needs to "chew" the food enough to activate saliva and enzymes for digestion. I do this with juice I consume on a daily basis.
Digestion isn't just what takes place in your stomach, it starts in your mouth.
What you get if you just drink it , is less absorption of nutrients, gas and such.
Extreme diets, like just eating fruit for instance, is in the long run unbalanced. People who do this re generally out of balance and trying to regain it by going to an extreme. More than likely though, it will just lead to another extreme to balance out this one. Sooner or later.... hopefully.... one finds a balanced way of eating. But, we live in such a unbalanced world today, these ways of eating are more popular than ever. But, in my view ..... they will never get to the root of ones dis-ease. this takes introspection of ones life. Simple ... yes .... but not so easy.
What I learned in my own life from extreme ways of eating is how I was motivated by fear. Fear of food, fear of getting fat, fear of become like "them" .... referring to my family who ate lots of junk. It boils down to fear of life. Food is just one way I try to fool myself into thinking I'm in control of the whole show. Ha ha. I'm not "god".. . nor is food.... nor is cycling.....nor is science ......nor is fear. I'll never know what "god" is in this human experience.... it cannot be defined. Yet I try . . . . fruitlessly I try. . . and then some moment in time it hits me like a rock in the head . In all humility ..... this is being human . I do the best I can in every given moment.