This policy will help you thwart your opponents' efforts to win a Diplomatic Victory. The bonus to Diplomatic Favor output and the refund you get for reducing other players' Diplomatic Victory points will buy you the time you need to push to victory while they recoup their losses.
Civilopedia entry Edit
There are nations that participate in international diplomacy but seem only to do so with the intent to spoil the functioning of those systems. Begging questions, whataboutism, pointless appeals, a sudden insistence on prerogatives—these are all approaches that can jam up the gears of international diplomacy for long enough that the malefactor can get away with whatever hideousness they were undertaking.