Well done to him indeed.
As for the danger factor, yes people do die on Everest, but then they die on Scafell too. A lot of it comes down not just to the mountain itself, but to other factors including quality of support, team ability and weather. I understand support is getting better (after a recent controversy where many people passed a climber in trouble without attempting to help him) and even mobile phone coverage is available at the summit.
The lad himself is relatively experienced and will have known what he was letting himself in for. I'm not suggesting that Everest is safe or easy, but from what I've read it sounds like he was as prepared as anyone could be.