It might not be the goal that they serve in practice, but if you ask a random person why they think some sort of copyright is a good idea, provided that they do

It might not be the goal that they serve in practice, but if you ask a random person why they think some sort of copyright is a good idea, provided that they do think that, uh, actually nevermind a fair number of them will probably talk about the rights of the creator of the work instead. Hm.