This year, debates in physics circles took a worrying turn. Faced with difficulties in applying fundamental theories to the observed Universe, some researchers called for a change in how theoretical physics is done. They began to argue — explicitly — that if a theory is sufficiently elegant and explanatory, it need not be tested experimentally, breaking with centuries of philosophical tradition of defining scientific knowledge as empirical. We disagree. As the philosopher of science Karl Popper argued: a theory must be falsifiable to be scientific.
Without experimental verification, then such ideas are no longer physics but rather, a religion. You accept things purely on a matter of faith, or beauty, or elegance, etc.. without being able to empirically show that it is valid.
I will fight tooth and nail to make sure physics doesn't go into that rout. If these theorists want to pursue such a thing, then they should stop calling themselves physicists and start their own religion.