There's not much science. That science is poorly reported by mass media. It's misunderstood by many readers. And most people have fierce cognitive biases anyway.
Basically, "talk to your children. watching tv stops you talking to your children". I guess that's reasonable, except you can't talk constantly at children. Not everything is a learning opportunity. The parents and the children need some down time. The science doesn't say anything about exhausted stressed parents deprived of human contact and the impact that has on children, or the possible benefits of TV to that parent.