Last night I was awaken by my Xiaomi Mi Band 5.
A few days ago I took a nap and set the DND –do not disturb– on a timer for 1h. Once the timer finished it went by default to "Turn off DND", which is the same as "disturb me please".
It's worth mentioning that before setting the DND for an hour, I had it one a schedule so it wouldn't disturb me from 10:30 pm to 8:30 am. It didn't go back to this one, it went to "disturb me please".
It's probably also worth mentioning that there is another mode called "Auto turn on", which detects when you're sleeping to avoid awakening you. Because this thing knows when I'm sleeping. But someone decided that the default should be to awaken someone if they receive an email at 2am.
So the thing that I bought precisely to improve my sleeping was designed to wake me up in the middle of the night.
Because of this I was wondering when did the "disturb" mode became the default? This applies to my phone as well, which I always have with DND turned on. How is it that we have to _turn on_ DND. Shouldn't it be "turn on disturb mode"?
What are the arguments that support this behaviour from a UX point of view?
-end of rant
Though, perhaps you explained it poorly, what's wrong with it turning off DND mode when your 1hr DND timer expires? What else is the point of the timer?
Does that smartwatch not let you toggle DND off until you decide to toggle it back on? Is there no silent mode?
I keep my iPhone on silent-mode almost permanently. Maybe it's time to try any of the other brands with this elementary feature?
But to answer your question, people generally want to be disturbed by notifications. Just consider how many people don't keep their phone in silent mode. I don't think it's the ideal way to live, but people love running over to their phone to see if it's a new WhatsApp message that cause the ping. Certainly my girlfriend and roommates and all the people I hear day to day who have notification sounds turned on when there's a physical switch on the device to turn them off.
Still, a silent-mode switch already gives you your dream of "I want to opt-in to being disturbed". Apparently every smartwatch except your Xiaomi watch has it. Time to switch.