Id say thats a bit of a silly arguement. We're all afraid of death, whether we admit it or not, or wherever we land on the spectrum of it. Some people are triggered out by it in way "Less dangerous" circumstances than others, but when theres a lion charging at you, you better believe you're gonna be scared. Its evolutionarily useful. Whether you are afraid of dying or not, be careful, you cant do cool shit if you're dead.
I imagine if you find some liquid formulation/dosing guide someone wrote for fentanyl you can tweak the numbers and apply it to carfentinil. How are you positive its carfentanil? Was it tested in front of you? Ive lost track of the amount of times people have said to me "Yeah this is definitely old brown dope, i can tell, its got that vineger smell." then i run it on the FTIR right in front of them and its Cellulose, Caffeine and fentanyl.