Over Qualified for a job?

How can anyone be over qualified for a job

I will never understand this whole concept of…”sorry sir/ma’am you are over qualified for this job”. So for example if someone who went to a prestigious college/university, with a MBA suddenly decides he/she wants a drastic career change to ummmm, uhhhh I dunno damn it, pluck chicken feathers for his/her new career. You are seriously telling me if Mr farmer needs a chicken feather plucker, the over educated applicant can’t pluck the ooooh soooo “special” chicken feathers? What type of bullshit is that? another example how can you be to qualified to push a mop!!

over qualified for a job

Now I get it, the farmer might be thinking this highly educated person might just be down on their luck, lost a job and just looking for a “stop gap” job, purely temporary, until they get back on their feet. So why invest in a temporary worker, with your training resources and expertise.
Why the hell not? isn’t it better to get someone on the job who is willing to do the damn job willingly, with some type of work ethic, rather than some disgruntle person, eh what do I know… moving on