Let's talk about typical Cat 1 minima for discussion; 200' and 800m vis.
Well, in EASA land it is more typically 200 ft and RVR of 550m. The correlation between visibility and RVR is not straightforward.
But what does matter is what your Ops Manual says. It will define what you need to see at DH to be allowed to continue; if you can't see that, a GA is mandatory. So your point is rather beside the point.