My vet gave me something to force feed my ill rabbit. Why can I not just feed it dissolved kibbles, applesauce or baby food?

An ill rabbit has, because of its situation, nutritional shortcomings or the need for extra nutrition, where ‘regular’ food, applesauce or baby food cannot suffice. Applesauce and baby food contain sugars which are useless for your rabbit and will not have extra value in critical situations.