The width of the runway has virtually nothing to do with how to judge your height above the landing surface right to touch down. ( Except glassy water of course which requires a specific technique. )
If width were an important factor then landing on snow covered lakes on skis or on same lake on floats judging height would be very difficult.
My intent here was to point out that the ability to accurately judge height right to touch down makes for far more accurate and safe landings.
Another factor we need to consider is agricultural pilots have to maintain a very accurate height during application runs, with some chemicals and crops the wheels are almost in the plants......so how do they judge height so accurately?
There is a big difference between being a barely acceptable pilot skills wise and being very accurate in all airplane handling realms.
It is not black magic, it just understanding the subject and becoming proficient.
And that starts with top quality instruction.