Is shyness beneficial to the society...?

Vijay has raised a point on the likely benefit the society may derive from shy people. I cannot agree to this fully. Society needs, and benefits from a variety of people with different characteristics. We need all kinds of people shy, bold, extrovert, introverts, activists, contemplaters etc. But there is s difference between shyness and introversion. As I said earlier, it all depends on whether one is comfortable with one's usual character/disposition or not. An introvert is not keen to mingle with others, not happy to attend parties or large gatherings. Because of this they prefer solitary pursuits or profession which don't need much social contact. They wont enjoy being a receptionist or a air hostess. They may love solitude, introspection, contemplation.
There are different kinds of personalities. If a persons ways of thinking, feeling, behaving and relating to others leads to distress or impairment it is called personality disorder. This happens when the variations in the traits is more closer to the extreme values for that trait.
Persons who detest social contacts and prefer to be loners belong to Cluster A personality disorder. This cluster includes schizoid, schizotypal and paranoid personality disorders.
A shy person desires social contact, is upset over his inability to socialise, envies others who socialise freely. To put it short he detests his social isolation and desires to change it. This is why I suggested ways to help them. Such persons belong to cluster C personality disorder in contrast to the cluster A person who does not desire social contact. But if he is truly comfortable in his state (it has to be borne in mind that many people say or make themselves believe they are happy just to avoid confronting the truth or fearing that it is difficult to change) he may be left alone.