The main controversy being addressed is whether revascularization in stable disease has benefit. Not heart attack patients. Not people with significant left main coronary artery disease. COURAGE and this trial address that question in different ways.
It is addressed in the article, but you kind of are left to draw your own conclusions:
> The participants in Ischemia were not experiencing a heart attack, like Senator Bernie Sanders, nor did they have blockages of the left main coronary artery, two situations in which opening arteries with stents can be lifesaving. Instead, the patients had narrowed arteries that were discovered with exercise stress tests.
This doesn't at all address the need for revasularization during a heart attack (about which there is universal agreement). It addresses whether revascularizing people not having a heart attack can be helpful.