The Medium piece conflates social justice and legal justice. Slavery was legal, so forcibly returning slaves to their owners was legally just. However, we came to recognize it as a moral wrong, something socially unjust. Eventually, we changed the laws, but the cultural change had to happen first.
The legal system is supposed to be a reflection of society's morals. If you challenge the moral framework, by asserting that an accusation should never be questioned, you challenge the legal framework by extension.
https://feministphilosophers.wordpress.com/2011/09/17/a-usef...
It is that aspect of the moral framework that people are attempting to change. Like it or not, society has collectively acted to excuse rapists for millennia. That has been gradually declining; at least now it's a crime that is taken somewhat seriously.
>we changed the laws, but the cultural change had to happen first
>This is not a legal argument about what standards we should use in the courts; it’s a moral one, about what happens outside the legal system
So basically you are describing the very means that will be used to change the laws to remove due process. "Morality" will be used change the legal environment.