Because technology and money
Technology is fiddly when you have to be accurate to within a thousandth of an inch for years and years and years of low maintenance and abuse
Money because the people who sell the printers actualy do not make money off of the printers themselves. They make money off of the ink and maintenance of these printers
It is literally cheeper to buy a printer, use up the ink in an hour. Go back and get it replaced with a new one. Than it is to get more ink for it to work again.
Monopolies suck
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