Would you rather call it “official” or “certified” or “genuine” toner cartridges? Because that sounds worse to me.

I mean, they really do need some way to differentiate their product from others. Because they do guarantee that their cartridge works with their printer (and customers would hold them accountable if they did not). They really can’t guarantee that with any others. (simply because they didn’t design the others, haven’t tested them, and have no power to change them if there was a problem. All of which is perfectly reasonable)