I think you're really fundamentally misunderstanding treatment modalities that allow people to be better, because you're conflating having an injury with weakness. Ex-soldiers with PTSD are one of the best studied.
> A wide body of anecdotal evidence and scientific studies reflects what many already suspected—animal companionship can help support positive outcomes in physical and mental health.
https://www.dav.org/veterans/resources/service-animals/
> Mixed model analyses revealed clinically significant reductions in PTSD symptoms from baseline following the receipt of a service dog, but not while receiving usual care alone. Though clinically meaningful, average reductions were not below the diagnostic cutoff on the PTSD Checklist. Regression analyses revealed significant differences with medium to large effect sizes among those with service dogs compared to those on the waitlist, including lower depression, higher quality of life, and higher social functioning.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5788288/
So either you doubt the realism of PTSD, or you believe that a studied treatment modality is weakness. That begs the question, what is a treatment that doesn't foster weakness? Because I'll guarantee the military tried it for decades and the suicide rate reflects that.
I do note you didn't mention PTSD, so if you would like to move the goalposts, my response is this:
Mental illnesses and their effective treatments don't care about whether you believe in them or not.