I understand that their business model is probably based on the whole "give away the razor, sell the blades" thing, but what they probably should do is just make the coffee maker a little more expensive.
The waste doesn't HAVE to be the issue since with reusable cups it's actually a decent option because it only heats a small amount of water, doesn't have a heating pad, has auto shutoff, etc. However, the insistence that people use the (worse for the environment) cups because it's more profitable is the real waste thing. You could make a coffee maker one-hitter that made better-than-average coffee, but the sorts of people who go in for Keurig convenience are not the people who care (so much) about these things.
[nb: I wrote this https://medium.com/message/keurig-didn-t-learn-a-damned-thin... My take is a little different from TCs]
You can with a laser printer and toner. Inkjet printers are still hugely profitable though.
>you can't shave without razor blades
You can buy a lifetime's supply of safety razor blades for the price of a modern kit. Razors are still hugely profitable.