I do not know even one person who is this emotionless trader. The machine can probably cope with these tasks but not real people. yes, we need to control emotions but we cannot get rid of them.
That will need experience for years to become an emotionless trader, and it's hard to do that. Every people will have their emotion and if that is related to trade, then they will trying to control the emotion so it will not interfere with their trading. Human will have difficulties to prevent to do something without emotion because we have an emotion that always inside us, and if we want to become emotionless, then we need to learn hard.
I know and I can understand that people get emotional faster for something they expected to get and then they dont get or they dont expect but they get, so it is part of life but in case of trading it does not work, as market will change so in this time some people use to make worst decision only because of being emotional so I also think that a trader should only be patient but not emotional one.