I think I will have to disagree with you in some parts.

The fact that the majority of the coders are guys doesn't mean that it's ok to create an app which shows boobs and then present it to a few thousand people. Although, I am sure those guys did it for a laugh, they did not understand the repercussions of their actions. With your logic it would be acceptable to put porn movies on a screen, just because guys like porn.

What would you say if the app displayed "male parts"?

I am European and I am pretty sure that if that happened here the response would be more fierce. A porn app is not liberalizing sex, it's just making things worst.

Finally, a business which succumbs to the desires of its clients, when those desires are exorbitant, is simply not a business to trust.