I was programming when I was in first grade. I was doing computer graphics and word processing somewhere around there. Those are important skillsets to have. I made use of those. You want kids to pick those up. You do not want to push those back. I’d get a computer of whatever form into their hands at the earliest point that they can avoid destroying it.
Most kids aren't improving their skillsets. They definitely aren't programming on cell phones. I am a programmer. I have code editors that I paid for on my phone at all times. I've used them like 5 times at most.
Social media and misinformation is damaging for everyone but more so for children. Social media is what kids are mostly doing.
I agree that there can positives for using a cell phone. Their are educational software but most kids aren't doing that.
You can still teach and prepare without exposing.