That's fine as a motivational phrase for real life, but how does it translate to a game with clearly defined rules and formulae for how play proceeds?
I refer you to my original post.
Running away & other avoidance techniques (points #1 & #3) are ingredients in intelligent play. IME, too many players these days think that any enemy they encounter is one they
MUST defeat right here & now. There is no concept of strategic retreat, so instead of trying to find a way around a situation, they head in like they were bulletproof. While they may indeed win
THAT encounter, it is a pyrrhic victory- they have expended so much of their resources that they can't handle encounters they should be able to.
And in that case, a TPK result is their own fault.
As for guaranteed TPKs, I stand by my assertion. Not
every foe is seeking to slay the party. And I've personally witnessed extremely unlikely die roll sequences- both good and ill, both as GM and Player- that drastically affected the outcome of an adventure or campaign, so you can't tell me that "no amount of luck" will save a party.
Of course, at some point, the PCs are out of resources and need to recouperate.
But does that mean that they should automatically get to "save game" wherever they please?
Of course not. Sometimes, the party chooses poorly the time and place to set up camp. This is not a description of bad play on their part- sometimes, they just don't know that the room they're camping in is the worst place in the world to be at that time.
If that is the case, they simply have to make do with whatever resources they have left, irrespective of "defined rules and formulae for how play proceeds" you seem to think are in the rules. (They're not there- at best, there are general suggestions about resource management.)
Do I, as a GM, feel badly for them at that point? Sure. But I'm not going to give them a pass- another form of deus ex machina (no better or worse than what you
think I'm doing)- by not having the scripted event happen, or accelerate their healing, or slip them meta information to get them to change their campsite's location.
Can it result in PC death? Yep.
Can it result in a TPK? Yep.
But those possibilities are
part of the game.