Obamacare has created a "new normal" for this country. The new normal is 20 to 30 million more Americans with health insurance.
Now that there are plans to repeal and possibly replace Obamacare, the reality of the new normal gives, even Donald Trump, some pause. Taking health insurance away from nearly 30 million Americans is more than just bad politics. It can be done, but it's not pretty. It can be accomplished by turning the clock back to before Obamacare when many more people went without insurance. It wasn't that long ago and the situation can return, but it would never be quite the same.
It wasn't good to begin with and it would be worse now as the number of people, who can't afford insurance premiums without subsidy, keeps growing. Larger numbers of indigent patients would further overwhelm charity care. Hospitals in some areas; especially in many rural areas, would go under and likely have to close their doors under the strain of providing so much uncompensated care. That is why even some Republicans, and Donald Trump himself, are worried about trying to find a replacement. Replace would be better than just ending the coverage that comes from Obamacare's Medicaid expansion and the lower end of the subsidized exchanges.
Can we make medicine cheaper? Yes. Can we be healthier and reduce the need for medicine? Yes. I don't see that many politicians, especially Republicans, pushing much in the way of things like healthier diets and so forth. Meanwhile it looks like ending the subsidies and just pulling the plug on millions of lower income Americans isn't a good option.