Casual observer,
Indeed you can't change the law of physics. As you could have seen in my rather generic graph the Drag coefficient increases to about a threefold between Mach .84 and M .98 together with an increase of TAS of about 15% this increases the Drag by a factor 4.
Now if you increase your speed again to M 1.8 your Cd decreases by a factor of three. It actually drops back to around the value it was at M .84. Now that the TAS increases by 80% you have a Drag increase of only about 10%.
On top of that you can do interesting tricks with the intake of a supersonic aircraft to improve fuel efficiency that you can't do while flying subsonic.
That is a law of the complex world of physics of transonic and supersonic flight. This made me wonder from the very beginning why Mr Boeing boldly went were no man has gone before .... so far.
Sq