The comment you typed in two seconds lands on a real face that reads it twenty times.

What takes you a moment can occupy someone for a long time. A remark typed between other tasks arrives at a person who reads it repeatedly, hears a tone you did not intend, and carries it into the rest of their day. The asymmetry is invisible from your side, where the whole thing was two seconds and then forgotten.

Reread anything sharp before sending and ask how it lands with no face or voice attached. If it would be softer said out loud, write the softer version, since that is the one you actually meant.