Why not use linux binary?

I like the container approach to this, as it makes it less OS-bound, however I wanted to try it as locally as possible, and when searching for the exe in the PSP SDK, I noticed there is also a linux binary (at3tool + libatrac.so.1.2.0 library) included there. So it made me curious - wouldn't it be more "natural" to build the image around the linux executable, without this whole Wine business? 