Tre fucks sometimes. Sometimes he starts playing the wrong song. I've seen it live. Just because we listen to their music obsessively doesn't mean they do, too. That would be kind of egotistical of them. They NEED to rehearse deep cuts like "Brat" and "At The Library."
I have to say, most of Green Day's song are pretty similar on drums. Tre can probably catch himself if he starts the wrong song.
Besides, this isn't about Tre. Is Billie really that dramatic to smash his own guitar because someone else fucks up?