Apologies, you're right. My reply was pretty dismissive and snarky (hey, it's HN, that's what we do, right?) but I should have been more thoughtful in my response!
I think this is probably the product of months of negotiation. First on the big parts, then on every damn detail down to the color of the ink. It's called professional lawyering. That said, total speculation on my part and maybe obviously IANAL.