So long as States are allowed to provide more than the Federal minimum you're still opening the door to having people with different rights based on their geographical location though...

Let's say healthcare is now 100% public and managed or forced on States by the federal government but medication isn't covered, you could have one State saying "alright, that's dumb, we will handle medication coverage then" and now living right across the State border means that you're paying for insulin or private coverage while your friend in the next town over doesn't know how much either of those things cost because it's all paid by taxes...

I'm using that example because something similar happened in Canada (one province decided to create its own medication insurance policy while it was an handled by the private sector in the other provinces).u