Most higher degrees are supposed to teach some higher level stuff from a broader perspective than what will be required on a daily basis on the job, so someone

Most higher degrees are supposed to teach some higher level stuff from a broader perspective than what will be required on a daily basis on the job, so someone who only does that particular job might be better at doing it, but will lack the ability to see beyond, and will still require degree-like learning. Whether it's better to start with the broader or the narrower learning first... well, that's debatable, and it might boil down to personal differences.