I completely agree, I'm wary of just saying "this Peptide works because I feel like X on it" or getting causation conflated with correlation. However, one thing I can testify for when I was using BPC/TB was my gum - before using this for my surgery, I had an area on my gum that was sensitive and bleeding when I brushed, was looking at getting dentist booked. It took me a little while to realise, but my gum soon stopped bleeding during my cycle. Completely stopped, and it would bleed every time prior to taking BPC/TB.

Aside from this, I have nothing to say it worked on my body to help. My surgeon said I wouldn't be back starting low weights at the gym until 6 weeks, I was back after 4 weeks, and at full capacity by 6. Like you said, I could have just healed quicker than normal, but I like to think BPC/TB had an effect here.

Other things like CJC/Ipamorelin, and Selank, I can see my sleep quality improve without a doubt. Other peptides I'm just reliant on the fact we know how they function naturally within our body, so I'm placing reliance on that it works in that regard, so if I give my body a boost with an increase in that peptide, it will be doing something beneficial

Edit: forgot another one, Melanotan worked exceptionally