The WebGPU spec identifies squarely as a web standard: "WebGPU is an API that exposes the capabilities of GPU hardware for the Web." There are also no mentions of non-web applications.
The It's true that you can use Dawn and wgpu from native code but that's all outside the spec.
The intent and the application are never squarely joined. Yes it’s made for the web. However, it’s an API for graphics. If you need graphics, and you want to run anywhere that a web page could run, it’s a great choice.
If you want to roll your own abstraction over Vulkan, Metal, DX12, Legacy OpenGL, Legacy DX11, Mesa - be my guest.
The It's true that you can use Dawn and wgpu from native code but that's all outside the spec.