In all honestly, I think we may need to side with Adam Sandler on this one.
While getting hurt was certainly not what was intended, when the scene requires you to get hit in the face with a dodgeball, you just need to be ready for it.
You’d never expect an adult actor to walk on to the set and have literally no idea what they were going to be doing.
The kids may not have been great at reading, but they likely could read.