That's absolutely true... But, I always can't help to remember something I read in "The Machinery of Freedom" by David Friedman:
"It took about 150 years, starting with a Bill of Rights that reserved to the states and the people all powers not explicitly delegated to the federal government, to produce a Supreme Court willing to rule that growing corn to feed to your own hogs is interstate commerce and can therefore be regulated by Congress."
By the same token, another thing that has already been extensively discussed here is the fact the "Shall not be infriged" couldn't be clearer, yet in many states it is almost impossible to carry a gun legally and in the majority where you can do it, you have to have a permit, even if it is a "shall issue" state, and that is in itself a direct contradiction to the 2nd Amendment. Not to mention the fact that in all states there are certain firearms you simply cannot get anymore.
What I mean by this, is that the perception of the people about these things change over time... We live in a world where almost nobody believes we can live without a central bank, or some regulation of commerce or even "some gun laws"... Every republican that "dreams of this" knows that they'll never get it, unless he compromises in a certain way to some idiocy from the democratic party, which is a huge force in the country. Because these are things that most where born to and to consider these possibilities is simply "crazy", despite the fact that the country was built upon them.
So, even though it is not an easy thing to do, I can see this happening at some point(the ATF would drool over it, for example) and the military could have to get to a point where they would have to go against the president and most of congress in order to not do this(since based on the examples I mentioned, what is written in the constitution can be interpreted in any way, including the exact opposite of it and it may be tried).
Whether it would work or not, I don't know, but it would have a high probability of war(which is what the founders considered to be a real possibility, since they put the 2nd Amendment in the Bill of Rights).