Emotional control is not "bottling up", it is control. Unrestrained emotional reaction is what leads to polarized emotional positions and views like, "bottling it up".
People aren't identical which means that they have to learn to control themselves but instead, they outsource the responsibility to a society and people like pscychologists who can do as much harm as good. Some external authority.
As far as the allergy analogy goes, though, it’s nice but not the way allergies work. Some are there present from birth. Some disappear as kids grow and some can take years to develop and present themselves as a sudden onset :)
Allergies change over time, some are treatable or manageable, some fade, some grow. Just like people. Understanding our own allergies is the way to go rather than expecting everyone else to do the work for us. The analogy works fine. People are hyper-sensitive to the world yet do not know how to control themselves which is why some people snap, some go dull, some suicide, some murder, some happen to have happy lives. Learning what works for the individual takes effort most people outsource to groups with agendas.
So basically self-development is a cool thing :) can’t dissagree with that.