“I’m five minutes away” from your couch is still a lie. A small one, but you’re practicing.

Nobody is harmed and the clock does not care, which is what makes it such a clean demonstration. You said a thing that was not true, you knew it as you typed it, and you did it because the real answer needed a small apology. The practice is in the ease: it comes out with no friction at all, and the next convenient untruth comes out the same way.

Send the real number instead, even when it is embarrassing: say twenty minutes and then be there in twenty. People adjust around accurate information and get quietly annoyed by optimistic information.