The main "Rule" of street photography is it isn't for the timid or shy, and not everyone is temperamentally suited to it and if it makes you uncomfortable go and do some other type of photography . P.S Beat Struelli's pictures IMO are very ordinary indeed.
I agree with you. Usually I'm not so good with street photography, but one day I got lucky. It was a St. Patrick Festival and the people there 'feeling pretty good' so I got a few good shots.