Access to /Game/ files?

Even trying to duplicate something in the /Fortnite folder is all locked. We can’t even duplicate it and move it out of those folders? We can’t open any Niagara file or import it into a new file. Just looking to loosen those reins a little bit.
I wanted to see if I could simply attach a static mesh to a spline, oh there are no static meshes available. All those building or prop files reference static meshes, yep back in /Game. Which all makes sense! Smart to keep the important things locked away. But it makes it hard to modify w/o any ability to grab texture, meshes etc and change them so it perfectly blends back into the aesthetic.
Also a staff member simply replaying “no” is also helpful. Even if that seems cold. I get it this is all super new and I’m sure Epic wants to be conservative and play it very safe. I’m just doing what users do and ask for more more more!