If you’re injured or ill but it’s not life or limb threatening and you decide to call an ambulance thinking it’ll be faster and you’ll be seen first… WRONG. Ambulance crews very frequently will advise the hospital staff that you “can wait”. Then we’ll plop you into a wheel chair and push you into the waiting room with everyone else.
It isn’t common but some places do charge for an “assessment” in the US. It’s relatively cheap compared to a transport, like $50-75 at least that’s what I know from my experience and I’ve only ever worked at one place that did that.