Consider the procedure of angioplasty. Doctors insert a catheter into the blood vessels of the heart and use a balloon like device to open up the artery and restore blood flow. In acute heart attacks studies confirm that this is an effective procedure. In chronic heart disease the COURAGE study and more recently the ORBITA study showed that angioplasty is largely useless. EBM helped distinguish the best use of an invasive procedure.
So, why do prominent physicians call EBM mostly useless? The 2 most prestigious journals of medicine in the world are The Lancet and The New England Journal of Medicine. Richard Horton, editor in chief of The Lancet said this in 2015
The case against science is straightforward: much of the scientific literature, perhaps half, may simply be untrue