I think emotion makes a person to trade evidently because there is no motivation there will be no excitement in your life and it will not stay for a long time also so if you have some emotion it will makes you to trade with some more extra effort I think it will be good for some people to gain huge success.
Yes, sometimes emotion is good for trade, we just have to watch it and make sure we apply it secondly because when you look at bad trading, sometimes fear ha successfully gotten a lot of people out of bad trading which fear is also product of emotion.
We just need to be able to control and balance our emotion so that we can be able to apply it when necessary to avoid poor decision making but taking it out completely will not be possible. Sometimes when emotion sets in, before making any form of decision, we need to check if the loss or win is three consecutive, then if it is, we have to stop the trade immediately.