Because they can charge that and get it, so why not?
It goes into quality of graphite, quality of design, research, marketing budgets, components, etc etc etc.
I have cast, fished, broken, and picked up most every rod out there over the years, and within each mfg, there are good rods and bad rods, the rods which fit my style the best are high end Sage rods. The others are just not responsive enough for my style, too slow, too heavy, no back bone, etc etc.
TFO does nothing for me and is miserable to fish, but may work great for the guy just downstream of me and be the perfect fit.
Whatever feels best to you and you can afford is what you should fish.