I gather, perhaps wrongly, that these events are well advertised in advance, so if you don't want to see naked men or women cycling, walking or dancing in the streets, just stay away from the area during these events.
Personally, I don't think they will make people regard the human body as something natural by staging these happenings, but that's their outlook.
I have never had any desire to take my clothes off in public, but as long as those who do so are not doing so in order to sexually molest others, I shan't complain.