"Please respond to the strongest plausible interpretation of what someone says, not a weaker one that's easier to criticize. Assume good faith."

https://news.ycombinator.com/newsguidelines.html

Interesting strawman. There are a lot of other ways to control inheritance than separating children from their parents.

Not really, because as mentioned the mere fact that the children have access to their parent's wealth while they are growing up already confers significant advantage.

Name one way that does not involve theft of property.

Before we start naming ways, are you somebody who thinks taxation is theft?

Are you somebody who can prove that it is anything but?