I enjoy the odd survival scenarios, so getting ganked after a bad dialogue outcome doesn't worry me too much. So long as someone can survive it back to Withers, we can try again.
For some dialogues you can just see the dreadful tactical set-up and likely risk. First time I played the Nere scene I had separated the party, redistributed scrolls and potions, and positioned supporting characters up high. Party face tanked up AC with some escape options. That wasn't meta-knowledge, it was plainly a dangerous situation.
Likewise the Githyanki, you get foreshadowed 3 times how dangerous it is. Buff up, click turn-based and go down. Heck, I've even talked my way out of that a couple of times. Missing out on the loot is kind of worth it, because I've had 1 TPK game-over and 2 retreats with heavy casualties there. Comparable gear can be found with less challenge elsewhere.
There is some incentivization to surprise attack, particularly on 2nd+ play throughs, but there are dialogue options you miss out on too. And often the dialogues are entertaining in their own right.
