ERs in the US primarily act as triage and stabilization centers for emergencies. Treatment for chronic illness or preventative care can't reliably be found in an ER.
An anecdote, the last time I had to go to an ER in the US was when I cut the flexor tendon in my pinky, I knew it was severed but since it wasn't life threatening they stopped the bleeding, put some liquid stitches in the cut, wrapped and braced it and sent me on my way.
I had to wait until the weekend was over to see my primary care doctor which I have access to because I have insurance / money.
An anecdote, the last time I had to go to an ER in the US was when I cut the flexor tendon in my pinky, I knew it was severed but since it wasn't life threatening they stopped the bleeding, put some liquid stitches in the cut, wrapped and braced it and sent me on my way.
I had to wait until the weekend was over to see my primary care doctor which I have access to because I have insurance / money.