Anyone who prints frequently knows exactly that ink and toner are enormous cost drivers. If you have replaced the ink cartridges twice, you could almost immediately buy a completely new printer instead.
Unfortunately, this has become a bad habit on the part of the manufacturers, which is almost tantamount to a frequently denied, but definitely existing, planned obsolescence in order to promote the sale of new printer models. The customer actually has almost no choice here, perhaps switching to a manufacturer that focuses more on sustainability.
So on the one hand there is still the possibility to switch to alternative printer cartridges and toner, but of course also to use the consumables sparingly. By default, the printer settings are preset so that “normal quality” is printed. Here you should consider beforehand whether it needs to be a high-quality print or whether the draft mode is not sufficient.
The bottom line is that the same rule applies here as with paper. The crowd does it!