Wrong. There would have to be something in the grants of the powers to the other branches that could reasonably be construed to authorize them to exercise those powers you mention. This is the third time now you're being asked to show what grant of power to Congress might reasonably be construed to enable it to act as commander in chief.
LOL, well that's a good sign, you're backing off and beginning to modify your original foolish statement!
LOL, as you've been told several times, the Constitution gives Congress the power to declare war and that, as you would say, is a traditional and historical "default" power of the office of Commander-in-Chief.
Therefore, according to your own ill-begotten principle (v 1.02), Congress can now act as Commander-in-Chief and not just declare war, but make war, also. How convenient!