I like that as a feature because I can use it like a normal root system. I have a pretty easy time seeing what goes in my home folder. It isn't esoteric to explore like system folders. If I had something I needed to keep private from Distrobox I could put it in my SD Card since it isn't mounted in the home folder on SteamOS and is in /run/media. You could also install QEMU in Distrobox or the virt-manager flatpak for a full sandbox.