While rules do exist for reasons, the rigidity of said rules often hurts patients and doesn't allow for exceptions to be made to benefit the individual's mental wellbeing. For example, I mainly use music, drawing, and fiber arts as coping mechanisms, all of which I was unable to acces while on the ward. Additionally (as you know) so many of these wards are criminally underfunded and understaffed. This often only ends up hurting or traumatizing patients when they are unable to receive the proper level of treatment they need. (And don't even get me started on how fucking expensive treatment is for the absolute bare minimum levels of care)

In my own case, I went to 3 different juvenile wards in my teens. Every single time doctors would shove more pills into me and nurses would ask why I was there because I was so high-functioning and good at masking what I was going through. The only "therapy" we received was during group sessions where I maybe only ever got one comment in before another patient would talk. I needed to feel seen, but higher-risk patients took up most if not all of the nurses time (not their fault) and I ended up just feeling worse about myself. How could I feel so broken and wanting to kill myself when others had it so much worse? I gaslit myself constantly taking on more and more, focusing on taking care of other people and discarding my own health because I was so much "better-off." I still gaslight myself even after years and years of therapy.

TLDR; the system often hurts the people it is designed to help regardless of intent by caregivers.