Alice, here in the USA the controller has little control of what the pilot wants to attempt in an approach. Either it is above minimums or below minimums. The pilot makes the decisions, not the controller. The controller tells the pilot all he knows about airport conditions. Also in the US if it isn't a commercial flight you can land even if it is below minimums if you want to. I have when I decided to divert in a Cessna 421 because it was below minimums and the boss heard the controller say the airplane in front of you made it in ok. I could see the runway from three miles out but when I flared for landing all I could see was the glow of the runway lights in the ground fog. Never again.