Agree with you. I absolutely loved my first computer at age 10. It became one of my biggest passions and skills in life (to this day). At one point (13 or 14 years old), my parents sincerely told me they were concerned that I was losing focus/attention on other important things. I took that conversation to heart and I tried to be more cognizant of my use patterns. Sure I stayed up to 3am some nights but I was exhausted the next day and I learned my lesson. It was unhealthy.

As they say "Better to teach a man to fish".

This can be translated to "Better to teach a kid how to know when they are using something in a unhealthy way." (rather than do it for them). May take some time but I think that approach pays higher dividends.