It’s not really random internet strangers’ place to judge someone’s parenting choices. We don’t know their overall parenting style, the personality of the child, what lessons they may be trying to teach, etc. The only thing we know for certain is that they want to use parental controls, perhaps to ensure they stay safe as they learn how to use the internet responsibly while also having a level of autonomy.
That’s not helicopter parenting, that’s just prudent.
Synergy has always been my go-to for a software KVM. It’s currently only $30, and it works great. I paid for a license probably a decade ago, and I’ve more than recouped my utility cost.