I suggest you read The Anxious Generation by Jonathan Haidt. As much as it is damaging to adults, it's much more so to children in early development all the way through puberty.

https://www.anxiousgeneration.com/

That’s the thing that is so ridiculous. Why is it magically OK to drive harmful compulsive behavior on your 18th birthday.

The interns at work talk incessantly about gambling. It’s just weird and wrong.

The answer to that is 'it depends'. We know certain substances like alcohol and tobacco can be/are addictive and yet the product still sells with warnings.

It’s a good point, but crimes against children are a higher priority because children are more vulnerable and the law exists in part to protect our most vulnerable.