Tommy,
This is a prime example of the organised creation of dissatisfaction. While I appreciate the intrinsic reinforcement achieved through the continuous practice of challenge, achievement, and reward, let me assure you this is a non-anxiety issue. Fuses in mains plugs are used as protection from a damaged lead, and fuses in units are there to protect components on the PCB.
Historically, fuses, from a retail perspective, were a non-issue; they were just another component to be replaced during a repair. However, in the search for further income within the industry, fuses were added to the list of pluggable items the customer could fit himself without requiring specialist knowledge or the use of a soldering iron.
So, one day a non-issue, the next, let's make it one; but just how do you go about selling an item which doesn't require replacing? The products already have fuses where required. The customer's system has been functioning perfectly well, and up to this point he or she is completely unaware there is a problem. This is because no problem really exists, so we need to create one. If you say this new fuse will improve something, you will no doubt make a few sales, but this allows the customer to say, "My system has sounded OK up 'til now so I don't really need a new fuse, as nothing will change if I don't replace it." So, it becomes far more effective to forget changing the fuse, or whatever the item is you are selling, and to concentrate on changing the consumer.
There is something inherent in human beings, and it is there for our protection and continuity; it is called fear. Here is an instance of how fear is utilised within the retail industry. If, for example, a customer were to have invested in a substantial CD collection, and I said this new CD player I am selling is super-fantastic, [a positive], he or she would be able to say to themselves, "That may be so, but my current CD player is more than adequate for the job, and I already experience more than a little satisfaction with last year's super-fantastic player." [Also a positive]. However, if I said the new CD player I am selling really shows what's on a CD, [a positive], which no previously manufactured CD player even knows is there, [a negative], you can see the potential for a fear of loss, no matter how illusionary.
This type of sales technique is applied everywhere to everything, and is there to make the consumer dissatisfied with his previous purchase as quickly as possible. If a cable or component shorts and your fuse blows be happy; it has done its job. Ask yourself if your perception of improvement by replacing a fuse has been reached through your analysis of the BDP-105 and PS9 being of improper design and poor quality manufacture, or whether you have been manipulated through the continuous, and virtually inescapable, bombardment of marketing.