It's probably accurate, and of course there are issues with socialized medicine as well. I have an interesting POV because I actually had my first relapse while I was living in Canada - I wasn't allowed to stay due to my disability but I have some experience with both systems. The waiting is definitely a problem - I didn't get into a neuro before I had to leave the country 9 months later, but at the same time I never worried about paying for treatment and I went to the ER when I couldn't feel half my body/couldn't walk without being concerned.
It isn't just socialized healthcare, though. It's also things like the US not mandating time off - for instance, I haven't had my Ocreveus infusion because I literally can't afford to take the time off to go to the infusion center. And the US is also very binary: Either you work full time or you get nothing benefits wise. For those of us who could comfortably work ~25-30 hours a week this results in either us overworking ourselves to the detriment of our health or not working at all. I'd love to work and just have a little bit of help for when I have a bad week or month, but that doesn't happen here.
The other problem with the American healthcare system is that it siphons off wealth from those in their end of life. Good luck planning a good life for your children: The government will take everything you own for your nursing home. That also has major impacts in term of stability.
But of course in socialized healthcare you do need to decide what is and isn't worth treating in some way and when cuts are needed you end up in dark places like Canada is with MAiD.
It's hard to say. I'm inclined to believe there are benefits and drawbacks to each approach.