Hi Christy, thank you for checking it out, and for your response. You could not be more right; our attention is largely misplaced when it comes to non-destructive media sanitization.
I am actually expecting to speak on this exact topic at the Electronics Reuse Conference in the fall. While it can certainly be complicated to develop secure, repeatable and scale-able data wiping processes, (and it can require experience and time to get it right without excessive cost), it all starts with understanding that the importance of the process supersedes the importance of the tools involved. My hope is that discussions like this serve to add recognition to that fact.
Thanks again!