> Other nations with "good health care" seem to [...] have long wait times at the ER,

How are you measuring wait times? How are you defining Emergency Departments?

In England there's a 4 hour target for people to be seen, treated and then discharged (or for a decision to admit to be made). Currently the English NHS is meeting that target for 75% of all attendances. This has declined from a 95% rate a few years ago, and it's seen as a massive problem.

https://www.england.nhs.uk/statistics/statistical-work-areas...