@MandyJane @Gnomeshatecheese Exactly. It's an excuse.
If you understand your argument, then it's no problem to explain it.
If you're unsure of your argument, then explaining it to someone will either secure your position or help you to confront any weaknesses in it.
It's being open to a good faith debate with the possibility to have your mind changed by new information or perspective.
I, for example, am open to the idea that men can become women if presented with evidence that it has happened and can happen. Nothing has been forthcoming in this department as yet, but there has been a lot of *men can change sex to be women if we change the definition of the words "men" "women" and "sex"* which is not compelling evidence. Telling me that they're tired of explaining the nonsense doesn't stop it from being nonsense.