Do people wear dumb watches to bed just so they know what time it is when they wake up in the middle of the night? I take my watch off to sleep.

Yeah, I do. I don't set an alarm, I just get up when I wake up. Sometimes I wake up at 4:00 instead of 7:00, the watch tells me to go back to sleep. No way would I use a phone for that - I set it on silent in case a group chat blows up in the middle of the night, but if I saw the notifications I'd have to check them. At 4am. Ugh.

No(t only). People wear traditional watches to bed because they have waterproof watches and couldn't be bothered with taking them off, and don't set their strap/bracelet too tight.

>People wear traditional watches to bed because they have waterproof watches and couldn't be bothered with taking them off

What does the watch being waterproof have to do with wearing it in bed?

Not that. Watch being waterproof has to do with not needing to take it off. For shower, specifically, but this extends to sleep as well.

>So I should supplement my smart watch with other devices in order to know what time it is? Makes $ense.

In order to know what time it is:

  (1) at bed at night && 

  (2) if you haven't kept it charged &&

  (3) if you don't charge it by the bedstand

One could see oneself suffering this huge inconvenience when sleeping if they value the other things their smartwatch does when it's charged and their are not at bed at night...

Besides, no reason to buy a smartwatch for its timekeeping, you could just as well buy a $10 Casio watch and be done with it. Or one of those alarm-clock/radio bedstand thingies.