To those who keeps saying "VS2013 preview and Windows 8.1 preview" are enough, so what? How is that any excuse not to release the finished code to the developer

To those who keeps saying "VS2013 preview and Windows 8.1 preview" are enough, so what? How is that any excuse not to release the finished code to the developers early so that they don't have to trust MS on this? How about we do our own testing and feel confident that our apps are ready on first day. There is absolutely NO reason to hold it back until Oct to release the same code that they can release now to people who paid for the perks of getting RTM early to make sure they feel confident. Why take any risks when there's like a whole month for the developers to test and validate against the final RTM/GM build?