Insurance has also skyrocketed the cost of care, I was doing a weekly physio/massage visit and with good health insurance it was a $50 copay. I looked back at what the place was charging my insurance and it was ludicrous. They were billing my insurance $400-600 a week and every little thing they did was getting charged. All the cool like "extras" I thought they were doing for me were becoming $50-200 charges.
I partially tore my achilles last year and most doctors I saw just wanted to check all the boxes so they could send a massive bill to my insurance. I ended up seeing 3 different doctors, a physical therapist and a physiotherapist before I finally found someone who really cared about helping me. It was $2000 out of pocket but he really went all out mapping my recovery and performing all kinds of interventions.
I am scared that universal healthcare would introduce so much bureaucracy that doctors will just process you asap, check off their forms and then shuffle you off. It feels like we are getting further and further from the world where you know your doctor and they can say something like "you only needed a referral, lets just call this $40, see ya in a few months". Now it is someone you may never see again, who has no control over how much you are billed and who has 20 more patients coming in behind you.