Typing a whole paragraph and deleting it isn’t wasted time. Sometimes that’s exactly how you figure out what not to say.

Deleting a paragraph you just wrote is how you find the edge of what should be said. It did its job by existing long enough for you to read it back and see that most of it was for you. That is editing performed on yourself before anyone else is involved, not indecision. Plenty of good silences were paragraphs first.

When a reply gets long, treat the length itself as a signal. Write the whole thing, then keep only the sentence you would still stand behind tomorrow. Sometimes there is no such sentence, and that is an answer too.