He is biased because the only gold medal Israel has won was in Windsurfing.
He's biased because he used to compete for Israel in windsurfing!! Of course he doesn't want kitesurfing to take over from windsurfing, he wouldn't have a chance to ride in the Olympics!
As for how dangerous the sport is, as long as you are intelligent and 'safe' in the way in which you use your equipment, I don't think it is any more dangerous than any other extreme sport. How about skiiers and boarders that ride off-piste without helmets on?
To be perfectly honest, we drive cars ever day and don't see that as dangerous because 99.9% of the population know how to use the equipment safely - I don't see how kitesurfing is any different and I would much rather be around a person who doesn't know how to use kite gear safely than a person who doesn't know how to safely use a car!