Why are there WSI KHR extensions?
Interface problems exist between the OpenGL family APIs and platform APIs due to external delegation of Windows System Integration (WSI). Vulkan brings these things to the surface so the Vulkan loader is visible, explicit, and endorsed by the entire working group.
Solving platform integration is part Vulkan, as opposed to OpenGL which says it’s someone else’s problem. The intent is to present the best solution based on variations of what’s been done with OpenGL. If needed, there are projects on Khronos Github that you can post related issues to.