I think there's a good bit of underestimating going on in this thread. That, and some unintentional ( or otherwise ) gatekeeping, to use a phrase I only just learned.
In my experience, boys love trains. Boys love firetrucks, helicopters, sailboats, and all manner of Rube Goldberg machines and things with moving parts*.
In the day, dad took you out and you helped him change the oil, the brakes, fan belts, and whatever else you could ( and maybe shouldn't ) do to the car.
You had Erector sets, radio kits, chemistry sets, electric trains, etc...
The idea that kids aren't into these things anymore because of iPhones and computers is simply NOT TRUE.
Kids aren't into them because their dads aren't fostering the interest. It takes time and effort, and video games and iPhones are cheap baby sitters.
I made sure my boys had all the "old" toys and developed their interest in them, along side the "new" stuff. I didn't have to push any of it on them. They had a natural interest and excitement. I took them to the train yard and watched them couple and load. We went to the firehouse and fire museum. Built Revel models, took apart guns, and populated shelves with "How It Works" books.
They have always had the Xbox ( so do I ), the smartphone ( when they got to their teens ) and laptops ( when I could afford them ). There was no proscription against technology. I didn't intentionally raise luddites.
But the old was always along side the new. It taught an appreciation for quality and maintenance and not being afraid to do things for yourself.
Did they still break every...single...thing? Of course, because...kids. But it doesn't mean they didn't appreciate it, and as such, they were always up for making repairs. And eventually got better at taking care of things.
Watches, I think, are part of that way of thinking. Boys want a watch. And they should get one as early as possible. An analog one. And learn to tell time. And maybe use the bezel as a compass.
Saying they are not interested, or not responsible enough, etc..., is tacitly saying, "Only we, the chosen, are good enough for watches." And then go crawl into the Cave of Sadness and lament that no one wears or appreciates a watch anymore.
*I don't know about girls, and I sure as the #@*% don't know anything about full grown women.
Edit: I'm not too crotchety - in my 40s - if it makes a difference in how this reads.