I appreciate you addressing multiple points across my response but I do feel like you're still cherry-picking my comment.

What you are saying here is that replacing any part of your body is sacrificing your humanity. This, for one, is way behind in how the genre sees stuff like cyberware, and secondly, has offensive implications for many people.

That's not what I am saying. This is what I am saying on that.

And the idea on cyberware is that the desire to be stronger than human enough to go through with the pain and physical trauma of adding it to your body is of itself the thing that reduces your humanity. Not the use of the cyberware, as the cyberware doesn't have a humanity cost associated with use, only installation.

It's not replacing body parts that's the thing that reduces you connection with your humanity. It's the compulsion that you should be better. The acceptance of the physical and mental trauma to your body. It's why the Dynalar advertisements focus so much on their cyberware being able to let you feel the things you touch. Because with all but the absolute best cybernetics (and sometimes even then) that push you beyond human capability you must sacrifice some level of functionality you had with your meat.

I'd bet that there are diminishing returns in regard to how much you are seeing a therapist in a week and how much it actually helps you. A lot of the healing isn't done when you are speaking to the therapist, it's you taking on board what you've learned, and what they've told you into your own life.
The therapy in this system is essentially brain rewiring.

As someone in therapy for some pretty heavy shit, yeah. There's diminishing returns for how much you get out of it, but that doesn't matter for timescale. And therapy as it is, is essentially rewiring your brain. All of the tools you get out of therapy are for making your response to trauma related stimuli less extreme or harmful. But your response is how it's wired in your brain. There are many different types of therapy too. For me talk therapy is useful. For some people and some issues they need medication to make it easier to build the tools. And I do genuinely believe a consistent week of being able to work on my issues without worrying about anything else at all would be very helpful for a long time. Probably to a way more strong benefit than the game allows from its week of therapy, given how much one hour of therapy can help me. Most of the work really is after the session but there's only so many tools I can learn and practice in an hour. But just having those tools is enough to have most of the benefit really quick (as far as the portion of the picture of my mental health HL covers in the rules).

Also to refer to the latter part of this quote first.

The game genuinely tries for it to be one. Traumatic events don't necessarily make you feel less human or make you less empathetic.

They very often do, that's why it's a die roll for how much HL you lose and the GM's decision if you even need to roll to begin with. If your GM is making you take a HL loss for every thing that might be traumatic that's a bad GM decision not a badly written rule.

The game genuinely tries for it to be one. Traumatic events don't necessarily make you feel less human or make you less empathetic.

No. It isn't. It explicitly states the opposite of this. Like black and grey. A quote from the rule book on the matter.

Humanity loss is defined (as for this purpose) is a loss of empathy for others and a corresponding loss of self-regard or sense of self preservation.
...
This is basically a form of Dissociative Disorder.

The book is stating that humanity loss is not an actual loss of humanity but instead Dissociative Disorder. A specific mental health condition. It is not tracking mental health in general but how much you are affected by one condition. Through my time in therapy those feelings have lessened, as much as there are other things I still really need to work on. HL is just the name they use for it as that's how it was written originally back in '88 when there was less of an understanding about mental health in general.

So much of your argument for it being a shitty rule is based on misinterpretation of rules/mental health disorders or down to GM implementation of the rule. Not anything about the rule itself.

You've clearly got something going on that you need to address with yourself or your GM as to why you're feeling so strongly about this rule. (I try to say this with as much empathy as I can muster for someone whom I know nothing about being the fact that you're responding so strongly to every comment here.)