"Sanding off the hard edges of a character" but it's people thinking that Jack Abbot could (and should) substitute his TEMS hobby with something indoor-sy and risk-less like chess, or reading, or the local soccer club.
Jack doesn't do TEMS by accident. We're introduced to Abbot as a solider from the beginning. Before we've even had more than 2 minutes of screen time with him we hear Robby reading his letter to the wife of the vet they couldn't save ("...I, like Ray, am also a veteran...") then bookending the first season with his talk to to Robby on the roof ("That is what happens when you're in a war and nothing makes sense").
And that's what TEMS is for Jack! It's going back to being a soldier, to the familiarity of 'hurry up and wait' on the slow days and the life-risking adrenaline on the fast ones. Jack as a combat medic/doctor is uniquely trained and practiced not just in battlefield medicine but in being able to step back from himself and treat the people he's closest to. In the army he would've treated the injuries (big and small) of people he had met that day AND of people who he had known for weeks or months or years. (That is a skill not only unique to him in the Pitt but also very likely (part of) the reason Dana goes to him when she's worried about Robby, and why Robbys other coworkers, even ones that are close to him (Dana, Caleb, etc) can't quite bridge the gap of being able to help him, in fact they do the opposite and almost step back on purpose- because nurses and doctors are explicitly taught against treating their own family and friends.)
All that to say: Jack gets to recreate that absolutely vital part of his environment with TEMS. He knows those guys, they would've worked jobs together, they would've done training runs together, they're his brothers: and he is also the one that has to keep his cool and stay objective to run in and stick a jerry-rigged tube down one of his brothers throats under active fire when shit hits the fan.
As jack himself said, playing golf cannot substitute that.
I think if Jack was ripped away from doing TEMS (or anything equivalent) at this point in his life, it wouldn't be healing, it would drive him to the edge of insanity. His personal alternative to doing his badass doctor thing while exchanging fire would not be to join a chess club, it would be to start doing shit like robbing banks and doing cocaine and killing himself. And I think Jack knows that about himself.
Taking risks and seeking adrenaline is not immoral or a sign of mental illness and distress in and of itself (despite what tumblr may have you believe-), and I don't think that any part of Jacks healing has to necessitate him suddenly softening up and contenting himself with some risk-less domesticity, and it's odd that this has seemingly become the status-quo of fics etc about him. I think Jack doing TEMS /is/ the lesser evil for him, anything less and he wouldn't be able to find his own balance.
Last ep of S2:
"Because it comes for all of us man. You and I know it more than most. We see it every shift, but we can't let ourselves succumb to it"
-This is part of how Jack stops himself from succumbing to the it.
(As an aside, this is why I also don't think Jack is nearly as against Robbys motorbike as people think. He's worried about it because Robby has implicitly told him that he wants to die, and is visibly unwell. I think Jack would be worried if Robby said his new hobby was knitting- because he might stab himself in the eye with a kitting needle. The bike just happens to be the thing Robby might use to hurt himself.)
(And I think there is more to say about Jack seeking every chance of taking back independence and competence and physicality that he would have lost temporarily after becoming an amputee,, but I want to reserve my thoughts on that a bit more in the hope that we might get to learn a bit more about it in S3+)





















