Actions speak louder than words means talking about something isn't going to make it better, you should take action so it helps solve the problem. I wouldn't say it talks about proving anything wrong based on the definition.
Answer:
because in a moment is more important and better than the whole day, like if you get heartbroken, your just gunna carry that the whole day which isn't good for your health. that is why.
I think it’s because Jerry didn’t want to fight at the rumble. I’m not completely sure though.