Take a look at the photo thread too.
The digital zoom is very limited compared to a full size optical zoom camera, but if you use your legs to get closer you can still get some great photos, and videos.
There are things that action cameras can do that normal cameras can't, and the other way around, they are very different tools.
As for your Yi 4K+ suggestion, it is higher resolution for video than the Gitup G3 and it's 4K frame grabs look really good, but using the G3 at 1080 resolution 60fps with digital zoom and stabilisation that the Yi can't manage has some advantages, it would have been very hard to match this frame grab with the Yi due to it's lower colour resolution, and the professional photographer in my frame grab got a much less interesting photo due to his narrow angle and the fact that he only had 3 photos to choose from while I recorded 60 per second so got the timing perfect: