> I are seeing parents give their two year olds a tablet which is absolutely detrimental to their development.

My kid couldn't care less about using a tablet or other device if there is any other activity on the table. In other words, for them to reach the point of using, I have to be completely ignoring them.

Is it really the device that leads to developmental detriment, or parents who aren't involved in their childrens' lives?

Just because your child has been this way does not mean everyone’s is. I have a 3 year old and even though I have been very strict about screen time (tv or phone) - she watched her first cartoon just months before 2nd birthday - from the very beginning screens were hypnotizing for her. She would stop whatever she was doing once a screen was playing nearby. No amount of entertainment I would provide would make her look away. So it’s good for you that you don’t have this problem, but from my experience and from talking to others this is definitely a struggle for many.