It is a general phenomena that the prevail of multimedia has led to the decline of language and communication skills though words are still our main medium of communication. While Multimedia Prevail Words and pictures indeed have different roles in communication.
Pictures can draw attention and are sometimes good to convey connotative ideas.
However, pictures are lack of subtlety and delicacy to be a reliable medium of communication. We seldom just rely on pictures to transmit important messages. Like the appreciation of art, the use of pictures in communication is very subjective. A picture may mean one thing to a person, but it may mean completely another thing to another person. Graphics can only supplement but not replace words.