People will always have conflicts from time to time, the only question is whether we let them deal with it themselves or have an authority with a uniform and a badge who is supposed to be trustworthy enough to handle it.
a trial by jury is the closest thing i think to a compromise between those two, where someones societal peers decide whether there even is a conflict and then who is "guilty"
a trustworthy person is needed to haul the relevant parties to the quorum and then deal with punishments, though with cell phones and cameras everywhere these days...
The courts have done a great job demonizing jury nullification, for example. In my opinion that's a feature not a bug, it gives the public a say over what laws they agree with enforcing.
I've also seen far too many examples of cases that seem blatantly unproven but forced through because of a combination of poor defence council and politically hot topics that the DA seems to want under their belt.