Re: Please enlighten me
Because even though you may not be able to apply the patch immediately, if you understand the details of the vulnerability you may be able to determine that your configuration doesn't have that vulnerability or expose it to attackers or that there is a mitigation that you can quickly put into place that will protect you until you can apply the full patch.
Even if they don't give details, that doesn't stop the hackers from finding out what was fixed, for example, using binary diffs and disassembly.
MS has stopped giving details on their patches and just pushes out a few big ones that may contain dozens of fixes. That hasn't stopped the criminals from releasing exploits soon after.