I dont think your quote is entirely relevant here. We are talking about someone who was under huge media pressure following the Obokata case. The Obokata case was heavily featured in the media here in Japan, and you can imagine the people involved must have been under tremendous stress. This scientist may have had some level of guilt because of his involvment with Obokata but that was nothing worth dying for to clear his name. This is much more about media exposure and pressure, and in that sense a more regular kind of suicide.