No, it's called an example, stop denying facts from the manga. What you may think is obvious, might be what Kishimoto considers true. Jiraiya stomps. Just like how Amateratsu is hot as the sun.I guess this is what you've been reduced to. It was obvious Itachi simply did not want to kill Jiraiya.
Depends on how the mirror works. If itself makes the decisions than No I doubt it. However if the user is in control yes.