Now if on actual arrival you don’t get the matching RVR, you can still fly the app to the da(h) with a high chance of GA.
OK my memory is a little rusty, but I don't think you can descend below 1000' ARTE unless you have the required RVR for the approach - ie you can not descend to DA if, at 1000' ARTE, the RVR's are below minima, but you can execute an approach until this point.
[edited to add: crossed with Bfisk - same point made]