My wife and I practice evidence based parenting. We do whatever is most convenient for us unless we can find substantial evidence indicating we should do something else. That's a challenge when it comes to parenting, because parenting is driven by hysterics, group think, and paranoia more than anything else.
What the data really indicates is that poor people and single parents let their kids watch more TV, and since IQ is highly heritable, TV watching ends up being linked to lower cognitive performance. But it doesn't seem to be a causal relationship, or at least the data doesn't clearly support that conclusion.
Obviously its important to engage with kids, and parking them in front of an iPad could get in the way of that. But at the end of the day, there are no prizes for making parenting harder than it already is.