If you do not have time, if you are too busy, if you have many things to do, if you are juggling different tasks.
Then avoid sending important messages or giving important speeches.
Effective communication requires time and intentional effort. No, you are probably not a natural communicator, and people will not get it one way or the other.
Depending on your role, communication might have different degrees of importance for you. If you are a leader, or if you are in a position of power, you should probably have it among your key priorities. But unless you can dedicate enough time to prepare for it, silence is your second best option.
[The time it takes me to prepare for a speech] depends on the length of the speech. If it is a ten-minute speech it takes me all of two weeks to prepare it; if it is a half-hour speech it takes me a week; if I can talk as long as I want to it requires no preparation at all. I am ready now.President Woodrow Wilson