Because this is ikva d’mishicha. Have a look at the final daf in Sotah.
Oh, and don’t tell me morals were so great 50 years ago. When were the Jim Crow laws abolished? What were the “laws” 70 years ago in Germany.
The goyish morals are always skewed, just a different skewing every time.
Like I said, Torah vs. Hollywood and you are expecting Tom, Dick and Harry to choose Torah? No chance.
We are the minority, don’t forget it.