Advantages of emotion:
1) Adds aesthetic value to the world
2) Helps us understand the world more easily? (but not necessarily better)
3) Emotions like fear help us stay away from danger


1) Aesthetic values are not a necessity in human advancement.
2) Obviously not, we can make better deduction without emotions.
3) Bad decisions resulting from fear is far more likely to happen.

There is no advantage in having emotions but its something we can't get rid of and just have to deal with.