You don’t get the same quantity of ink in the cartridges.
When I used to sell computer equipment, I knew the numbers and while I don’t know them specifically now, I can assure you the multi billion dollar companies didn’t start putting more ink in the cartridges that come with their printers. They are starter cartridges and print only a portion of the pages replacement cartridges will print. In my day, the cartridges that came with Epson, canon, Lexmark, and HP (the brands we sold) typically had 20-30% of the capacity. Once in awhile Epson would sell a printer with full cartridges as a promo.
I mean, you’ve already made a bad choice going with an inkjet. Buying more ink is a bad decision. So is buying a new printer but you might get better features
And if anything you’re part of a nice metric that shows buying replacement ink isn’t happening