This is the future, if your child doesn't learn how to use technology from a young age they will be left behind. If you want no phones go be Amish.
It's not about being ignorant of technology or not, it's about gratification. Like how fapping to much messes with your brain.
Some parents just allow their kids to play all day, and we know games are designed to be addicted. Not exactly good for young, growing brains. I'd say keep these gadgets away from anyone not yet in gradeschool.