Neither "has truthiness". Copyright exists as a separate legal doctrine for a very simple reason:

It is materially different from theft. Enough so that making property law fit copyright is not feasible in any reasonable way.

One is based on an presumptive right of the individual to protection of their right to continued use of something.

The other is an artificial government monopoly restricting the public from exercising their right to full use of their own property, by preventing them from copying and distributing information that is legally already in their possession, and where nobody are deprived of continued use at all.

I think you miss understood me. I used the word "truthiness" to mean it sounds like it is true. For someone not fammilar with the issue, saying pirating is a form of theft sounds valid.