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.