That doesn't hurt, but some people may not be able to afford that either and if you're looking to donate these machines as functional to someone in need, you might need to leave those drives functional. I usually follow the process I outlined above/below when donating the machines. I usually keep my data on a separate drive that I remove when giving away a computer or if sensitive data, an encrypted container so I'm not too concerned. But others may not work like some of us.