That is correct. Any principle, carried to its logical extreme, results in absurdity. "Consistency" btw is not a virtue in itself, only a useful principle. It has no moral standing. And as Emerson said when correctly quoted, "A foolish consistency is the hobgoblin of little minds."
Emerson was right. A man much wiser than I once said, "There are times when it is necessary to rise above principle and do the right thing." He was right too.
I tend to think that if consistent adherence to a maxim leads one to folly, it may be the maxim that is at fault, not the consistency. Once we decide that consistency is only useful to a point, the argument begins: where is the point? And then you might as well have not had a maxim to start with, once people start consulting their own personal idea of what is “right.”