Victor's whining always makes my day.
Asking for a optional feature = whining.
Nice logic
As an option I see no harm in it, the more options the better. Allow people to tailor their game session, like with the tabletop.
Yep. If someone wanna the original "everyone can soak dozens of javelins in the face" low lethality, they can just not use the option. 5e lacks lethality.