I'm not calling your "position" (that large companies have a certain attitude) short-sighted. I'm calling THAT ATTITUDE ITSELF short-sighted. The company doesn't DIRECTLY collect a penny from resale of its products, but the expectation of either a resale value or continued long-term use value contributes to the price customers are willing to pay for those products. You'd think that MBAs would understand this, especially given that some advertising campaigns explicitly reference it, but unfortunately I must agree with your "position": Many, if not most, large corporations see no value to their bottom line from continuing to provide any kind of assistance to owners of discontinued hardware.
Even if it's just leaving some moldy drivers on a web server for a few more years, along with a statement about how they no longer support those drivers, and provide them on an as-is basis as a convenience to customers who have had these printers for over a decade. A statement like that tells me that the hardware is tough enough to outlast the OS the drivers were written for, which inspires confidence in the new printers they're selling today.