Where do you get that? That is absolutlely NOT the case.
We have had PCs actually die in more than half of the campaigns we played. We lost 3 PCs permanently in 3 different campaights (no revify or resurection, roll a new character) and had one TPK in Baldur's Gate, Descent Into Avernus.
I am comparing this to 5E, where I have played a lot and did not "run roughshod" to 2024 with the same players and the same DM where we are "running roughshod".
The only thing that is changed is the game system!
You have this completely backwards.