Imagine the difference between software distributed as a tarball and the binary package. Both totally work, but one is so much easier to deploy in bulk. (This is obviously a very loose analogy, but I think it's roughly correct)
So you keep saying, although don't see any evidence for it. MS want you to move to using the MS Store, because that's not terrible. Or manually download multiple files, put them all in specific places and use a powershell script to install it, hah, so easy.
MSIX is just a wrapper around an msi, exe, etc installer anyway.