For office attire or going out, sure.
If you're doing repair work, running lines, etc, a watch is the choice. Your hands are busy, so a watch is what you need (Except for specific trades where you don't want to risk it getting caught in machinery).
I can say with 100% certainty that I know large swaths of folks in their 20's and 30's who regularly wear watches. Some smart, some digital, some analog.
The problem is its already pretty public, just for mods and admins, and non-lemmy instances.
While I agree its not ideal to have everything be public, given it functionally already is, this just makes it easier for users to see. Right now its a minor hurdle, but still a hurdle - but your votes are not really private/anonymous to start with.