Me. (Although, I may be one of those guys that knows nothing about guitars. I know a fair piece about basses, though.) I have string preferences, but I am open to other options. Sometimes factory strings are junk, and sometimes they are carefully picked to suit the instrument. My newest bass still has the factory strings. I hated them at first because they sounded "hollow," but with just a little playing time I found them workable. I'll change them when the tone is no longer workable.Here's the thing. Aside from people who know nothing about guitars, how many of us buy a bass & leave the stock strings on? We all have our personal preferences. Why should Fender offer a choice of strings if we're just going to change them for new strings anyways? Even if the bass is brand new from the factory, I ALWAYS put new strings on.
Here's the thing about all these options. Fender has sold a variety of "flavors" of P basses over the years. Being a for-profit business, if it sells, they stick with it. They discontinued the 5-string P deluxe; does anybody want to guess why? They still make the American Standard to specs that are very similar to what they have used for the last fifty years. Again, does anyone want to guess why?