Theft is a criminal act. What you describe is exploitation and, guess what, it happens everywhere. I am sure there are many pieces of clothing in your and my wardrobe which are made in East Asia in sweat shops. So we are, in your eyes, thieves.
Anyway, I don't care whom Roddenberry fucked or exploited. He set the benchmark for what Trek should be with his first pilot and it is no coincidence that the first season, with its echoes from The Cage like Kirk having his Hamletesque moment of doubt in Balance of Terror, is the best. Ever since its birth Trek has always been good when it was about ideas, not just adventures and action.