I know that that's an unfair generalization, but I wonder these days what the requirements are to be hired by the likes of Geek Squad. Are there any requirements at all? (Other than the lack of a soul.)
No, there literally are not.
Well, I can't speak for Best Buy specifically, since I have not worked there, but I have worked for a retail big-box store in the hardware department (power tools, carpentry tools, paint, electrical, plumbing). When we were doing the job interview I told them I was quite knowledgeable in consumer electronics: TVs, stereos, phones, computer cables and accessories, kitchen appliances, and other housewares. But their hole was in hardware, so I was scheduled to fill it. I knew nothing, but they "trained" me by making me go through a few hours of PowerPoint slide shows about tools and brands.
I know I pissed off a lot of customers by being a clueless sales associate, and it drove me crazy because there was nothing I could do. I tried to learn as fast as I could, but no matter how much I knew, there was always a customer who knew more and needed my help to find a product. All the while I kept grumbling that if they'd only put me in housewares and electronics, I could be so much more useful.
I only worked there a few months. I learned a lot, and took pride in being able to help a lot of people with simple questions. And I treat salespeople differently now that I've walked in their shoes. (Be polite and patient, but only ask answerable questions like "how much is X" and "where can I find Y" and "do you have any more of Z". Don't ask for advice or believe anything they say about products -- always go home and do the research yourself.)