Some people communicate better by typing than they do with their voices.
Some people need to do both at different times, or even within the same conversation.
Maybe you’re like that. Maybe you could say more things if you used your hands and a keyboard rather than your voice sometimes.
You almost certainly know people who could communicate better if they didn’t always have to speak.
Knowing that this is a thing is important. So is being a safe person for other people to type to if they should.