They are not even reporting whether he was thrown from the ride or not.
Yes, you’re right, and if the boy were dramatically killed in that manner, the word would be out by others in the park and on the ride.
With so little official information and no indictment of equipment failure, by other park customers, and those who were on the ride is what makes possible a question for the boy’s health, that might have been unknown.
It happens in sports. Certain stresses can be deadly and unknown.