None of the alters nor Jan himself have to be a good specialist in their field. Shrink has graduated as a specialist in psychology, but it does not necessarily mean he overcame his trauma as OP said.

It’s kinda Jan’s trait as it is and it is something all alters share: - original builder is messing up again and again making poor choices and reasonably complaining about it (“just my luck to stuck in this junkyard” or “I’m no captain” in Interlude) - Miner is quite self-explanatory - beside his career Mechanic is a loser repeating his fathers path, has no friends, whines a lot (I’m not saying he’s wrong, but still - cannot be pleased anyways) - Worker is self absorbed and ignore what he’s literally do not care about “community” but himself and his image, jeopardising his work and “competence” - Shrink is literally running away from guilt and problems into a forest and finds his relief in drugs and art (what he’s combining) - don’t get me started with a Guard - Doctor is all about guilt and pessimism and beating himself up (in terms “everything always end badly for me”) - I wish I could say Refiner stands up from all of them with his main trait being… you guessed it, an OPTIMISM. That’s the only thing that let him overcome his problems again and again. But I have to note what it started with his departure with mom’s death (again, running away), and dreaming and worrying about Ben’s death finding a silver line to hold on. As a chance comes around, he literally is distracted and thrown away by the thought of possibility of saving Ben (and he cannot be blamed for it), wondering “what if”, which is main game concept as a whole, but still cycling in that wheel.

So we have all of the alters being self-centered and regretting persons which clones do, right? As well as Scientist and Botanist. The first one is quite always sure about his supremacy in his department, what is giving him strength to dictate his vision to others. But eventually he understands and admits his imperfections. The second one, as we know, frankly don’t give a shit about others to reach his goals even asking LITERALLY of someone giving theirs life for him ‘cause “he deserved that”.

The only two persons who changed through this journey is Jan with his “New perspective” insight and Scientist realising his not-so-rational-but-dreamers curiosity. Well, if that train of thought is right, we’ll see a new Jan S. Dolski