Why do hospitals insist on serving Jello?

Aside from the usual liquid diet reasons. Jello is pretty easy to get through your system. If you're trying to get better, having something easy to digest is good for you (not necessarily good). Especially if you're on a jello and liquids only diet. Another reason is that they make so much of it every day for all those liquid diet people that they just give it out to everyone since they have so much left over.