Societies have progressed and regressed over time, have been replaced by others who did the same, rinse and repeat.
Over time, mankind has learned a few lasting lessons.

One of these lessons - widely understood to be self-evident (save for Hollywood) is that preventive arresting or killing of people who *might* turn into criminals is not appropriate. In fact, it is so utterly inappropriate and proven to be a poor idea that it is almost perfectly universally loathed.
Some practices such as this are so bad, mankind has learned to forego all analysis of costs and benefits in specific cases in favour of a universal maxim of "don't".

This was also true of torture, which was understood to be cruel and a thoroughly poor idea in the Western civilisation.

Sadly, the previous line was written in past tense because a few years ago a really big Western country did a really big regressive leap and actually left the consensus of Western civilisation on torture.
It even did so overtly, officially - unlike a generation or two ago when only a handful people working in the shadows ignored the norms of their civilisation.


The unwillingness to heed the hard-earned wisdom of earlier generations was and is strong in them.