It's the 3rd party inks that I'm talking about. Who is verifying they are compatible? The Chinese company selling on Temu? Why would the 1st party verify a 3rd party? Licensing fees?
The point is that companies don't want/need to support 3rd party, and by allowing 3rd party opens their devices up for complaint when 3rd party doesn't work.
Is this an age gap situation? What you're describing as difficult used to be the norm. You could go to the print shop with a cartridge and they'd fill it with whatever they had for a reasonable price. No one had to support third party cartridges (you'd refill the first party cartridges and third party cartridges were designed to be compatible). It was a perfectly acceptable system for everyone except the manufacturers, who weren't happy with consumers that would buy loss leader printers and skip the ink.
The point is that companies don't want/need to support 3rd party, and by allowing 3rd party opens their devices up for complaint when 3rd party doesn't work.