As a therapist who works with children with sensory processing disorders I find this discussion very interesting. Sensory processing issues are very often unrecognized and misunderstood. Yes many people have sensitivities to certain aspects of life... noise, touch ,crowds, lights and still manage to live their day to day lives without incident. We all have our "quirks"

Most people who are "highly sensitive" do not have a disorder.Their nervous system perceives things differently and they learn how to cope. Interestingly many "highly sensitive" people turn to activities such as running and cycling because of the calming benefits it has on their nervous systems.

However there are those that are "disordered" and it can severely impact all aspects of life. There are many people who have spent years in therapy for anxiety, depression, feeling that they do not fit in with other people and just always feeling "different". There are many who try to self medicate with drugs or alcohol.
Sensory "differences" are very real and can be life altering to many.