"It is not pretended that every insertion or omission in the constitution is the effect of systematic attention. This is not the character of any human work, particularly the work of a body of men."
James Madison, Federalist Papers 1791
So if it's inattention, it's still not warranted under the Constitution. As to the incredible stretching the feds have done with the Commerce Clause in an attempt to infiltrate every aspect of life in America, it has been intentional, and ultra vires. The feckless courts ("interpreters" of the Constitution) have been willing accomplices in this and get not congratulations on their capitulation.