Do you have a source for that statement? I think we can agree that 'traditional Lutherans' would exclude ELCA. Of course in general, 'Christian' might exclude ELCA on their current path.
Traditional Lutherans in the true sense of the word would mean LCMS and WELS. I believe in this respect, you are in error.
It had been my understanding that some Lutherans maintained Marian beliefs that are similar to Catholicism.