Jokes aside: the waiting times in most of Europe are fractionally longer than in the US and that is mainly because more people have access to more medical aid in the first place. It’s easy to get fast appointments if the percentage of the population actually trying to get them is way smaller and that’s not a good thing come to think of it.

Besides: a doctor’s appointment at a general practitioner is usually on the same day, in rare cases on the next. So you will always have quick access to a doctor if you need one, ER care and such nit taken into account, because those exist as well of course.