I linked to the Daring Fireball counter-arguement because there’s a legitimate argument that Apple didn’t need to copy 3rd part developers to come up with these tools.
That doesn’t mean that the developers for Konfabulator and Watson feel any better about having their market pulled out from under them. It also means that 3rd party developers for Apple will think twice about creating something that Apple could roll into the next release of the OS, which means fewer 3rd party developers on OS X.