I disagree while the assertion that he (you?) makes there. The constitution lays out what the federal government is allowed to do.
If it is not explicitly allowed, then it's disallowed.
The Bill of Rights was not supposed to be needed, and is not an all encompassing list of what the government cannot do.
It was just a clarification, make a few examples explicit. The 10th amendment even states that.
But we have 200 years of encroachment where the politicians and the judiciary have weaseled in all sorts of stuff by wordsmithing.
Twisting the interstate commerce clause to so cover purely intrastate, or even local use (see the case about a farmer fines for growing wheat for his own consumption fined under federal law because hes personal production affected interstate commerce since he wouldn't then be buying wheat.
Wickard v. Filburn)
You're right in that the Constitution
as a document lays out what the gov't can do, and
only do. But, perhaps not the best wording, as a 'charter of negative liberties' points to the ideas upon which it is based - rights. And those rights are of the nature where others are
'restrained from action' (negative rights) against others - (except in self-defense, of course), and more to the point, where no rights
demand action from others in order to uphold a right. IOW, one can't force another to educate them, provide them with food, housing, etc. - what could refer to, wrongly, (because no such 'rights' exists), as 'positive rights'. The concept of natural rights requires
no action from others, other than to
not interfere with another person's life (the basis of the idea of laisseze faire - let them do - leave them alone).
And you're right, the Bill of Rights was not supposed to be needed, especially in the eyes of James Madison, who basically wrote much of the Constitution, in that he believed delineating
certain rights was the best way to only end up with those delineated and that the nature of gov't would tend to do away with all others not listed, hence, when he was convinced, mainly by Jefferson, that the Bill of Rights was necessary to pass the Constitution and to ensure certain factions that important rights would be upheld, he wrote the 9th and 10th amendments specifically for the reason you mention - that the 8 earlier amendments were not the
only rights that were protected. I think a good case could be made that Madison was right in his original 'don't list any' view, but also that Jefferson (and others) was right in that there would have been no Constitution without them
Also, I think a very good case could be made that even listing particular rights hasn't protected them. Freedom of speech, press, religion - upon which NO law was to be passed, has taken hits by the PC crowd lately and the progressives much earlier. Not to mention the 2nd, 4th, 5th and a few others. So even the listing was not much protection after about 130 years.
And agree that Wickard v. Filmore is one of 'The Dirty Dozen' decisions that changed the face of the Constitution. See:Robert Levy and William Mellor's book by that name that listed the 12 worst Supreme Court decisions which tells much the story, in terms of bad court decisions, of how we got where we are today.