Apple's review isn't that useful in this case as a pre-check, it is possible to avoid it if you want. Apple review does automated code checks & a reviewer manually using your app. With that review process you can deliver executable code after the fact in any way you want and only get caught after the fact if it's even noticeable. You can even get sneaky and add some security exploit to make it look like a mistake.

It's much like the argument 'if you ban guns only criminals will have guns' and it's quite true in this case.