You can run your new, fuel-injected car until the gas tank is empty, and then enjoy paying £1,000's to fix the damaged injectors.
The EXACT same thing can be done to your Epson printer. Those piezoelectric injectors NEED ink to keep them cool. To ensure that they never pump air, Epson has the printer 'count' injections. Since you won't pay millions for absolutely accurate micromachining, Epson leaves a 'fudge factor' in the calcs, so you don't destroy those print heads.