One of the big differences between TNG and TOS is that Kirk would find loopholes or rationalizations to bend the Prime Directive when he knew morally and ethically it was the right thing to do for the good of a culture, while Picard would rationalize how NOT to do anything bold or risky in similar circumstances.
As I said in the other thread I don't want to know what would have happened in A Taste of Armageddon if Picard had come across the civilization.
That whole mess with how TNG interpreted the prime directive seems to have its origins in yet another of Roddenberry's mandates for early TNG (like the no conflict nonsense)
One of the drafts for Justice, from when it was still a serious episode even had a scene where the crew starts debating on how to help the inhabitants of the planet improve their extremely harsh/deadly justice system, only for Picard to declare that they'd be doing absolutely nothing of the sort.
I mean I understand where they were coming form, I really do, but it's difficult to sell in a TV show, I think, and often ended up making the heroes look too cold hearted.
"We cannot save this civilization from that comet, if we do one of them might become the next Hitler in the future!"