My nephew graduated from college 2 years ago with a degree in economics. He works the night shift at the airport for FedEx loading and unloading planes - a job he probably could have gotten without a degree. He’s actually quite happy there and not too interested in looking for a job in his field. But at least he has a degree to fall back on and it always looks better on a job application if you can say you have a degree in anything. My sister is just happy he is employed.
As a WWII vet who used the G.B. to get an education in engineering from a world famous university and years of working up the ladder to become a ‘boss’, I have for years told young people seeking employment to always look beyond the job at hand. I have two related first main requirements,1) make yourself of value to your employer and job no matter what you are doing and 2) always look for what can be done with new ways and ideas from your education. Don’t be disheartened by rejection. It seems to me that your nephew is in an ideal spot to have a fulfilling career.