Most stories don't actively strive to be 100% historically accurate, but that also doesn't mean that they will totally and completely abandon any semblance of historical accuracy. Psychologists and psychiatrists are modern professions, it's a given that in a medi-fantasy setting they won't exist. The characters have to deal with their traumas mostly on their own and by relying on their loved ones. I don't see why you think that obvious stuff being done off-screen is pathetic or lazy though. Yes, it is a flaw of the narrative, because it was an important plot point that wasn't given the right attention to, but it's still obvious that Tia did go through a process throughout the years where she had to learn how to cope with her own traumatic experience. This did happen off-screen and it's about as obvious as knowing that Tia went to the bathroom off-screen. Is it good writing to leave an important part of the story happening off-screen? No. Did it happen anyways? Absolutely. It's just plain obvious. Also, ad hominem does not make your point any better. I suggest you refrain from using it.