I dont think medical graduates go door knocking for jobs or start on $42k a year
No, but I bet they submit resumes and don't get every job they apply for. They are also entering a workforce controlled by their "union" (AMA) who actually look after their members. It's also irrelevant. They didn't expect their employer to provide their education. They got it first, then got the job. That's the deal, and they knew it going in. And like pilots, not everyone makes it, but you've still got the debt.
In 2014 a study by the major Universities reported "the average starting salary among all graduates was $48,888", so pilot "graduates", while below the average, certainly aren't alone. Everyone has to start somewhere, and it's usually at the bottom.