In the PAW, why keep are we so worried about time? Do you have somewhere to be, like work? I plan to trash the watch/clock since I can't stand keeping to timed schedules anyway. My dream world would be to go to sleep when I was tired, wake up when I was rested and work in between
Need to meet people, need to know when
to meet them.
When it takes hours to get somewhere one doesn't wish to wait hours for them to show up, as then one gets home after dark and the cows needed milking ages ago.
In my day, we didn't have virtual reality.
If a one-eyed razorback barbarian warrior was chasing you with an ax, you just had to hope you could outrun him.
Safety isn't a lever on a gun, a guard on a knife or any other mechanical device. Safety is a behavior.