Earlier quoted context omitted.
That's not a sufficient answer. The claim assumes that copyright and patents are proven to be beneficial, measurably better than the prior situation. Are they? If so, how? Not to mention, is there any proof there's no better solution?
Proving that there's no better solution is impractical. However, the size of the copyright-backed creative industries today, by any reasonable metric I can think of, is vastly greater than the size of the creative industries built around the alternative models that have been tried noticeably often so far. That seems to include all of volunteer-based, crowd-funded, mass donation-funded, traditional patronage where som…
Even assuming that "market size" is the right metric for comparison, that comparison assumes that the existence of copyright law has had no negative effect on those "alternative" models. Numerous readily available examples suggest that it has, however.