Yeahhhh no. You don't get to blow up norms and then blame the other side for blowing up norms, and 9 SCOTUS judges is just a norm, no matter how hard you try to claim that it is not.
The Dems adding SCOTUS judges 10, 11, 12, 13, 14, 15, & 16 would be just changing norms, as there's nothing in the constitution that prevents it. Sorry! Maybe the GQP should win elections next time.