I'd like to add that emotions aren't specific to humans, rather it's built-in in every social species to varying degree. Emotions are litteraly built-in evolutionary survival tool to avoid you from fucking yourself out of the tribe and die alone.
For instance, some monkeys forage for food in group, and some might be tempted to hide it away to monopolize it, but the moment other monkeys discover it, they'll tear the selfish monkey apart.
However, genes always seek out to outplay competition, so humans are also built-in with selfish impulses even though they live in group.
In today's society, if an individual doesn't feel much emotions but are smart enough to understand what's the better for them in the long term (and not put them in prison), they can live the best life. Just look at CEO lol. In conclusion, emotions are optional but you'd have to study how they manifest into the cultural rules and practices because they are methods of social cooperations that emerged from quite a bit of evolution and trials.