The original post started with an Apple Watch, so it is worth being fair to it. Apple Watches are popular for good reason. They are easy to use, pair well with iPhones, handle calls and messages, track movement, and fit neatly into daily life.
The problem is that site life is not daily life. A building site is rough on anything with a screen. Watches get dragged past timber, knocked on frames, scraped against steel, covered in dust, and exposed to weather. Even if the watch still works perfectly, it can quickly start looking tired.
That was the issue in the original post. The Apple Watch had not necessarily failed, but it was scratched up enough that the owner was thinking about moving on. That is probably a common experience for tradies who like Apple products but also work in environments where consumer tech gets punished.
An Apple Watch can still make sense if someone values the phone integration and is happy using a case or screen protector. But based on the thread, it does not seem to be the first recommendation for builders who mainly want something tough and low-maintenance.