Finally, you are ignoring other fields such as literature or music where there is no secret sauce to keep hidden.
Literature and music existed for thousands of years without copyright which makes this discussion quite surreal.
I'm not sure abandonment of copyright will stop development of programs but it sure as hell will not not stop creation of new literature and music works.
As an avid reader, I realize that today authors don't make that much money, and publishing is not a particularly high profit-margin business. Take away the ability for an author to sell to multiple people and far fewer authors will make enough to live on.
And this is bad thing... exactly why? Sure, amount of throw-away literature will go down, but I'm not convinced that good authors (you know, the ones who people really like) will not be able to sell nothing. Yes, it's harder with books as compared to music (music is supported by live concerts just fine), but then it's cheaper to create, too.
And, again, I'm not saying that it's always a bad deal to use copyright as subsidy to authors, but we should never forget that it's form of subsidy, not a natural right.
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