There is lot of more complex workflows than someone going to doctor for consult.

Just think of getting some labwork done. First it needs to be ordered. Then patient must go to nurse to get blood drawn either immediately or after not eating long enough. Nurse needs to know how many samples are needed and if there is something special. Then those needs to be tracked and delivered to lab. Lab needs to know what tests to run. And then results need to be available for years.

And you probably want some sort of alerts for values outside expected ranges and in cases where they are really off. This might consist of one or multiple systems, but all those should interoperate automatically.

And that isn't even imaging or treatments.