Witness testimony is also known to be flaky. We are entering a world where video can be faked(probably easy to tell currently if it’s fake but in a few years…).
Short of a confession(which honestly has its own concerns regarding how it was obtained, knowledge of their rights etc) , what are actually good evidence of someone’s guilt?
I can see possession crimes(the officer searched you and found meth hidden inside your sock) or financial (you claimed to have this asset and used it as collateral for a loan but that asset really belonged to your sister’s husband) but for example rape and murder cases what can be used as solid evidence?