Good points. The original films were many other people's "babies" as well, not just George Lucas's, but in the end, they got paid for their work, and George has the rights.
More importantly, my main point is still that the petition takes a tone that I believe undermines its goal. If we make a new one, we should ask, not demand. I'm aware that a more pleading petition may not gain as much attention as a more dramatic demanding one, but given George's defensiveness, which approach is more likely to elicit a positive response?