It does seem painfully simple that consuming more energy than you burn/excrete is going to turn you into a sink, and a lot of that surplus energy is going to be

It does seem painfully simple that consuming more energy than you burn/excrete is going to turn you into a sink, and a lot of that surplus energy is going to be stored as fat. (And the opposite process applies when you consume less than you use.) Is this an oversimplification, or is the average education/propaganda/understanding so confused, and so overwhelmed with different nutrition ideas that the wood is being missed for the trees?