FWIW, imagine how a greenhorn might feel working on a team with you. If you feel like giving them some time of your day is a waste or that listening to their problems is a waste they're not going to feel enthused working on your team. Sure, that doesn't necessarily influence your current work item but it might contribute to overwork later if they leave for a team that actually makes them feel like they matter.
One solution I found is to write a quick status in the chat and excuse myself from the stand up.
Sometimes I finish 20 minutes before the stand up and think about what to do next. I usually won’t go into deep work but plan something, write my todo list on paper or review some PR to make use of the amount of time that’s to small to get into flow.
Even if the meeting itself was instant it would take more than 10 minutes. You would have to stop whatever you're working on, even if you're in the middle of a valuable flow state. Then after the meeting you have to get back into whatever it was, which alone can take you more than 10 minutes depending on the depth of your work.
If that's not bad enough then what you talked about in the meeting can also linger. You'll think of problems others have had and it causes your mind to lose focus, now you have thoughts about your problem mixed with other problems. These meetings also tend to happen during the mornings, smack in the middle of the most productive hours of the day.
No, a daily standup takes much more time than 10 minutes.