Why can't children inherit from their parents?

It depends on the specific situation. If it is testamentary inheritance, the parents did not leave the property to their children, and the children naturally could not inherit it.

However, if it is legal inheritance, children, as the first heirs stipulated by law, should inherit their parents' inheritance. If you can't inherit, it depends on what the reason is. There is no evidence in law to sue for rights protection.