Consumer and small-office print is declining, so there is not enough money to be made making non-shit printers from scratch.
Making shit printers (those that are sold below cost with the profits recouped from cartridge sales and other user-hostile measures) is the only thing keeping the market afloat.
However, that segment of the market is already captured by the existing manufacturers (which have the existing patents and supply/manufacturing chain - aka economies of scale) that a newcomer would never be able to enter said market profitably.
Making shit printers (those that are sold below cost with the profits recouped from cartridge sales and other user-hostile measures) is the only thing keeping the market afloat.
However, that segment of the market is already captured by the existing manufacturers (which have the existing patents and supply/manufacturing chain - aka economies of scale) that a newcomer would never be able to enter said market profitably.