Why use a 3D modeling software for static mesh?

that might sound like a stupid question but 3d modeling software does the exact same job for static mesh as unreal engine if not harder, i used blender and almost done the same exact things but in more time and tried doing it in unreal and it was 10 times faster.
So i wanna know whats the use of it and if i should use it and in what exactly?

i imagine they were using BSPs which you can edit the shapes of. BSPs are not exactly static meshes though and from what ive seen dont perform as well.

Unreal currently has no 3D modelling capabilities whatsoever, so whatever you’ve achieved in UE4, it wasn’t modelling. You might build some walls with the built-in shapes, like cube, cylinder, etc, but to create new models, like a chair or a tree, you have to work with a 3D modelling software.

But besides that, BSPs are not comfortable at all. They were in Radiant / Hammer editors, but in UE4, I’d rather run around naked on a winter hilltop in Siberia than to touch them more than I really have to.

they work ok for doing basic blocking out but for anything more than that dedicated software is a must. with modeling software you can not only be more precise and creative with modeling but theres all the other aspects like uv unwrapping, baking textures, rigging which cant be done in ue4.