If a preliminary test shows something they're happy to run more tests. It's how they make money. ER is triage. If it's not something they can fix with a needle

If a preliminary test shows something they're happy to run more tests. It's how they make money. ER is triage. If it's not something they can fix with a needle and a bag (or a needle and thread) rolling you in for expensive tests and specialist consultations is their entire business model. Your commentary doesn't make sense.