I think "this makes no sense". It's like saying "Rolls Royce should decrease the price of their cars by 40% to compete with Audi - they would sell more and therefore make more money". Why would they introduce a flagship product at $1500 when they already have a flagship product at $1500? Not to mention the no doubt massive investment to on R&D to come up with this product that has to be recouped, the product is no doubt very expensive to make, also the costs of distributing it globally, so unless sales would double or treble or quadruple they wouldn't make more money. Not only that I can think of a few thousand people globally that would be mighty pissed if they reduced the price of their flagship product by a third - namely those who paid $1500 for it.
Other than that, great idea
I expect they've more than recouped the money they invested in designing probably every single of their main models, especially HD600 and HD650, with the exceptions of HD700 and HD800. They can charge what they like, but we can call them out for it.