I mean it is literally the issue that planning poker addresses - identify differing expectations without influencing the initial estimate. People can then totally ignore that, and ignoring something makes it pointless, but that's true of literally anything.
It identifies a lack of a shared understanding of the task. Or framed differently, it identifies when you probably all have the same expectation and you can move on.
It identifies a lack of a shared understanding of the task. Or framed differently, it identifies when you probably all have the same expectation and you can move on.