Back when I was getting into electronics, I used to drive around during hard waste collections on the lookout for interesting devices to pull apart. (One man's trash is another man's treasure!)
Honestly, it was shocking how many printers and scanners were being thrown out. Every second hard waste pile had one. These were devices that looked 3-4 years old at most.
Clearly many people employ your strategy, and the companies are to blame. The volume of waste they're incentivising with their business model is criminal. I hope HP get everything that's coming to them.
Colleges are a huge problem with this. They charge per page, it's reasonable... but a lot of the Laptops used to come with coupons for near free printers. So basically all of them get chucked at the end of graduation or even each year.