Godot doesn't have any broken importers, yet alone FBX which it doesn't have completely for legal reasons. Looking at Collada(.dae) Blender has a super broken exporter, so broken that Godot folks wrote a better one from the frustration. GLTF2 doesn't have enough support, even though it's a good format.

The problem is that everyone is just sitting and using proprietary FBX format and don't work towards new open standards like Collada or GLTF2.