Yes, but not the
tautological is. "People should not be sued for their entire worth for pirating songs," isn't derived from, "People like to pirate songs." It's derived from, "punishment should be equitable," "pirating a few songs isn't that big of a deal," and "that's scary." And those are derived from even further beliefs.
The important question is, if you take the root beliefs and walk back up the tree, do all of the beliefs come to an overall support of free copying? Then you do that in aggregate for society, taking into account uncomfortable truths about the economics of music production and advertising where necessary and on a level individuals won't when they derive their inevitable personal free-riding preferences. Going from high level feeling to high level feeling ("I like file sharing" -> "file sharing is right") does not work. Almost everyone says that they would prefer to pay less tax too.
To put it another way, there are plenty of things people would do if they could get away with it. Not paying taxes, driving as fast as they want, tossing cigarette butts wherever, etc. Your exact argumentation could be used to say, "Society's views about these activities need to change," but that's not actually the case. All you are observing is that people will take advantage of situations where they can get away with something, even if it's not ultimately good for society as a whole. In no way do I accept the norms that you're deriving from this. Rather, I should say that I don't accept the way you are deriving them. My personal jury is still out on whether I think filesharing is a problem that needs to be addressed more or less forcefully.