So, someone with such an exploit couldn't have done that a week or two later to give people time to patch? Plus, you've released a few, unusual examples where the vast majority of patches are to vanilla vulnerabilities in software that provide us little, learning experience. Saving attackers labor while increasing risk on defenders isn't good for security.

Time to respond is always valuable. Amateurs rushing out patches can cause as many problems as buggy software, especially if the patches are buggy.