mtgx theorized it would be easier with access to the Windows source, and it would, and you know it would, and you're purposely being obtuse; arguing for the sake of arguing.
There is a reason we have programming languages, and we don't all write directly in machine code. Just because it's techincally possible to do things in a more difficult way doesn't mean they would be done that way with a faster, easier option readily available.
Sure, it'd be "easier" in a strictly literal sense. Just as it'd be easier to write these exploits on a system a 60" monitor.
The point is there's not a /significant/ difference; understanding code at a high level doesn't really help to attack it (it can make it harder, since the edges that you look for to exploit are precisely those parts you try and abstract away in a higher-level language), and the windows codebase is well-understood with lots of publicly available information describing in, even without the source code.
How well do you understand the Windows Update MITM issue? Take a stab at explaining exactly what part of it would have been easier with Windows source code?
There is a reason we have programming languages, and we don't all write directly in machine code. Just because it's techincally possible to do things in a more difficult way doesn't mean they would be done that way with a faster, easier option readily available.
Stop being silly. :P