Parents shouldn't overstep their bounds and make every decision for their children.
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history
From《庄子·逍遥游》: 庖人虽不治庖,尸祝不越樽俎而代之矣 — even if the cook neglects the kitchen, the ritual officiant doesn't leave his sacrificial vessels to take over. Each role has its place.
usage
Strongly conveys 'crossing role boundaries.' Often used to politely decline doing someone else's job, or to criticize overreach by parents, bosses, or governments.