But those sales wouldn't be in addition to their existing high end processors, they would be instead of, plus with a $3000 price tag the sales would be low and economies of scale wouldn't kick in so the production cost would remain high too.
Their existing designs are well tried and tested, R&D costs are low and the fabrication process has been refined sufficiently to have very high yields so the margins are very good. There really is no incentive to sell anything significantly better unless forced to by competition.
The Alpha processor used to be what you describe - massively faster than anything else, but highly expensive. They remained an expensive niche for people who needed the highest performance at any cost.