Well, she does have some points.
1. Avoiding processed foods is a great idea. Only good things can come from this.
2. There is a lot of protein in vegetables that they are not given credit for. I do not believe that the tracker can account for all the protein. Complete protein for humans is made up by essential amino acids. If you eat carrots with cabbage, for example, the amino acids from the carrots will make up the missing essential amino acids from the cabbage. So when eaten together they will have more protein than when eaten separately. I haven't seen any evidence that spark tracks amino acids.
3. If you eat nothing but salads for 6 days and then have nothing but ice cream on the 7th, you are probably way better off nutritionally than if you ate prepackaged foods from the diet section of the grocer's freezer. You will get huge amounts of micro nutrients and phyto nutrients as well as fiber that are going to be missing from most American diets. You won't be loading your pancreas with refined carbohydrates.
It is certainly possible to live for a very long time only eating fruits and vegetables, and be totally healthy.
Don't panic. Don't fight. Try it. If it doesn't work out for you, tweak. Add tuna to the salads. Have a side of crackers. You won't starve.
"There's treasure everywhere." Hobbes, in Calvin and Hobbes