Well, using your words, you are willing to prevent progress and preferring to maintain that the state continuing carrying out what you called "an injustice". Slightly stronger wording on your part. In addition, there are already solutions to the problem that you cite as the reason this injustice should be maintained i.e serial killers don't get bail/bond.

"i believe it works generally"

Based on what? It doesn't seem like you are very informed on this issue. As numerous other people have pointed out any reforms would continue to allow for potentially dangerous people to be held pretrial.

what metrics would you use to show that it works?