So with that hammer you build products that you might sell and I might want to buy with my money that I got from selling my idea. But if you 'take' my idea I will have to get a new hammer just the same. There are infinitely many hammers as there are infinitely many ideas, but getting new one takes nontrivial amount of effort for both cases. The fact that one is tangible is in my opinion an arbitrary property for the purpose of this discussion.
So with that hammer you build products that you might sell and I might want to buy with my money that I got from selling my idea. But if you 'take' my idea I will have to get a new hammer just the same. There are infinitely many hammers as there are infinitely many ideas, but getting new one takes nontrivial amount of effort for both cases. The fact that one is tangible is in my opinion an arbitrary property for the purpose of this discussion.