When one business is hiring the other is firing makes sense to me and that I think is how business generally operates. Businesses are not perfect and things change and it's important for competition to either collaborate or leverage the situation. I think it's healthy for businesses to go out of business so others can rise up and take its place. I think back to Simon Sinek and his definition of war. The goal of war isn't about winning or losing even though we all make it out to be.
Conducting business isn't so different. There's no "winning" in the game of business. There's no specific rules. We've just conditioned ourselves to think there are rules: being the sole business in a specific industry.
If a company is losing sales or workers, the idea is how your executives put it: how can we retain customers? In many cases it's building a better product or service, improving the quality of life of the workers. Things like that.
With copyright issues I think it depends on the circumstances. Having Mickey Mouse not be part of the public domain I think is reasonable. Now holding the rights to the word "Mutant" however creates a whole mess.