Agreed. However the big difference being that outside of just some in the military/military watch-dogs, the American public is cluess/doesn't care about Metzger. Her ordeal didn't make national headlines, didn't have the President on the WH lawn with her patents when she returned, didn't have a Congressional hearing which also gained national attention, and most importantly didn't involve the trading of 5 enemy Taliban.
Bergdahl's situation involved all of the above. So I agree with you about Metzger, Bergdahl has gained a lot of national attention and Congressional inquirees...and we still don't know exactly what happened in terms of the official report. My guess is that it will eventually be released when the 2016 nomination process heats up...this way it won't gain as much traction in the news media. Bergdahl will probably be given an other than honorable discharge, will never see the inside of an American military prison cell, and that will be the end of it. He would face a harsher punishment if he told a sexual joke at the workplace.