For those entering this field as residents, the job market is wide open. IF you do a Cardiac Fellowship, your career is enhanced with fewer cases to supervise vs a general person and higher pay as a locums. Unlike many on this board, I believe 1/2 those doing a cardiac fellowship, or more, will earn more money and have a better career than someone without a fellowship but this "payback" period is at least 20 years, if not 25.
Regardless of whether you choose to do a fellowship, the job market is wide open right now and demand is high. I've never seen demand this high in 30+ year career. The reason this field is competitive once again is because $500K is the norm and $800K+ is available to those willing to bust their arse. CRNAs are routinely earning $300K+ these days, some $400K or more.
So yes, this field is one in which a mediocre Med Student can finish residency in 4 years then make a boat load of money.