Less keyboard typing.
Less a waste of time.
The way to input text is not only keyboard typing but also other ways, 'Select text', 'Input time automatically', 'Input date automatically' and 'Create URL to Maps'. And you can change by tapping whether text of pieces will be included in message. So you can keep the loss of time by typing text to a minimum. And you can make different messages from one template when you have to edit message in any situation.