Are we talking about games or medical devices here? I expect different things from them. If a medical device needs to turn off bounds checking to get results I'm concerned enough to not want to let anyone use it. If a game can get a slight performance improvement I'm all for it, who cares if it crashes, it is just a game.
Who cares if it crashes? The users.
We can all agree it's not medical systems, but audio DSP and game dev both end up rewriting a lot of STL stuff to suit their needs, and often using a restricted subset of modern C++ features for similar reasons.
That isn't some arbitrary choice, but pretty much where everyone continually ends up when solving real-time problems using C++. Whether those be games or not.
You can prevent more than enough crashes with enough testing to make gamers happy. Even if you prove there is not out of bounds error I still want a medical device to check
Screw this game! I lost all of my progress because it crashed and the last auto-save is 10 minutes old. Uninstalled. 0 stars. Getting a refund.