Canadians receive a lot less care than Americans do. They wait a lot longer for that care. Given the health problems Americans have derived mostly from obesity / diet, will that cause a lot of trauma to American patients vs what it does to Canadians? Maybe (I would say yes, but it's an extremely difficult data point to calculate)
I do believe that if Americans had a better diet and got more exercise, they'd need a lot less healthcare.
Americans are also the most over-tested, over-diagnosed, over-medicine'd people on earth. It's of course one of the factors for why there is so much cost in the system.
One of the first things that was always obvious that a government take-over of healthcare would focus on, is the amount of healthcare available, especially to older patients. Obama tried to dance around that issue when confronted with it when the ACA was being passed, but it was understood by anyone familiar with European style socialized medicine.
1) lower frequency of use; 2) squeeze pay for healthcare workers; 3) stop the rise of drug prices by refusing to pay the ever increasing rates or refusing to allow patients access 4) use cheaper alternatives when possible