Been informed about the time is important so that we can plan the rest of our activities. A wristwatch is one of the devices with which we can know the exact time of the day. Although there are different other devices which can carry out this same function, there are different circumstances which shows that the wristwatch is an invaluable asset.
Dead phone batteries
With mobile phones it is easy to know what time of the day it is. However, when the battery of our mobile phone dies we cannot know what the time is if we don't have a wristwatch. So the wristwatch could serve as a backup in such situation.
While working out is difficult to check the time with our mobile phone because of two reasons. First, since we sweat during workout session our phones and bodies gets covered with sweat when using the phone. Secondly, the weight of the phone in our bodies serves as a burden, this can't be compared to having a lightweight wristwatch.
The wristwatch adds a nice touch to your outfit (especially with suits), giving a hint to your personal style.
If you are also not comfortable with the bare wrist look, wearing a wristwatch can accessories your look.
Wristwatch can be seen as something outdated with all the technology surrounding us. But there are still some nice qualities in them, that if you have stopped using them there is always a reason to go back to using them.