In Ray Bradbury's "The Veldt," the real reason the Hadleys installed the nursery into the home was to keep his children busy, while removing guilt from himself and his wife for abandoning the children to raise themselves.
During his lifetime, Bradbury was top two or three in speculative fiction and often, in compelling science fiction, gave warnings that seem far too close to today's reality.
"The Veldt" was published in 1950, about the same time that the television became a common appliance in American households. Now, it's not clear whether "The Veldt" was a response to the spread of television, but today, the warnings of the story are prevalent. Young children today, according to a University of Michigan Study, spend about 32 hours per week watching television. This number does not include how much time these children spend playing video games or watching videos on social media.
The Hadleys, like today's parents, have a life of their own to attend to, so they need to leave their kids without feeling guilt. What better way than to allow Wendy and Peter (an obvious allusion to Peter Pan) explore their own worlds. Unfortunately for the elder Hadleys, the world the kids explore is just fine without them.
While the kids' reaction to their parents trying to take away the nursery may be shocking to some (they kill them!), these people obviously haven't tried to take away their kids' cell phones or video game systems.