I might add i was sent solo in 6 hours and it wasn't until I did my FIC that I realise how much I had not done before solo. So completely understand where CAT III is coming from with what did the instructor miss out.
Now I have sent folk solo in under 10 hours but they are the exceptions. And everything has to go like clock work for it to happen. Did they turn out better pilots than the guys that need more time?. Usually not to be honest you usually find that the ones that are poo hot at handeling couldn't find there arsehole with a map and compass. And the ones that the basic handeling took a bit longer to bed in found Nav to be a walk in the park.
Most folk think wanging around the sky is the be end of everything being a pilot. Its not actually, the having the mental understanding and capacity to not have to need **** hot handling skills even if you do have them is the sign of a good pilot.
Learn it properly the first time, it is the foundations for the rest of your life.