And then one day the underlying libraries will have security problems. Your statically linked application has just become a gaping hole.
And finally, you don't want your statically compiled binary to be hundreds of megabytes and take forever to launch, do you? But seeing how many people here are advocating Snap/Flat/AppImage, I guess it's not a problem? But why would you need a Linux userspace or OS in the first place when all you are doing is running virtual containers? You can run them on Windows or MacOS as well.