Animator: Why "Copy Transition Parameters" can not copy a Interruption Source?

The title says it all. In Animator View, I right click a transition on the Inspector of a state. Next, I click "Copy Transition Parameters" and "Paste Settings" or "Paste Conditons" or "Paste Both". But it do not paste only Interruption Source.

It seems to be a specification that has been around for a long time, but inadvertently forgetting that the Interruption Source is not pasted can lead to mistakes.