Self-inflicted harm doesn't elicit the same kind of moral outrage that true torture does. These efforts seem to me to be an attempt to exploit that moral outrage in order to benefit a particular person. If successful, the lack of clarity that introduces just creates extra doubt in cases of true torture that blunts the outrage.
Here are some similar cases:
After conducting a bunch of bombings, Eric Rudolph fled the FBI by living in a forest for years, feeding himself by gathering acorns and dumpster diving [1]. His choice to do that to himself is similar to what Assange did, and was not torture, either.
Rudolph's brother, bizarrely, decided to cut off his own hand with a saw to protest the FBI's treatment of his brother and its surveillance of his family [2]. If the FBI had done that to him, it'd have been a gruesome case of torture, but since he did it to himself, it's definitely not torture.
[1] https://en.wikipedia.org/wiki/Eric_Rudolph
[2] http://www-cgi.cnn.com/US/9803/09/briefs.pm/rudolph.amputati...