your argument is basically a strawman of the pro-interventionists: no one is suggesting that the UFP's primary missions be scrapped so that they can go around looking for planets in danger.
The changes made to the PD the anti-PD folks want would result in that.
Also, it's not "anti-PD," it's anti-TNG PD. The TOS PD was fine with interventions when it was necessary to save the civilization.
Anti-PD is anti-PD, TOS or TNG or otherwise. Folks don't understand the consequences of these things in the long-term.
What if aliens had decided to stop the great meteor that hit Earth and killed off the dinosaurs, resulting in humanity never existing? Would you think that was a good thing?