Flag waving, swaying, joining of hands, the Last Night of the Proms is one of the only events in the classical music calendar where strict rules on audience silence are broken. This year it is the 118th Last Night, but the first concert that will be conducted by a woman.
Stage fright comes from fear. It comes when the mild dose of adrenalin that you need to help you perform well, gets out of hand. Your body overreacts and goes into fight or flight from a perceived threat. You are 'only' performing but that performing in its most extreme form, can feel as if you are in extreme physical danger.
Before your band can reach the heights of Coldplay or U2, you have to build your audience and that means playing as many gigs as possible.