Some more detailed context, in case this makes a reader more or less likely to want to see it:
At the time this happens, Marc is actively bleeding out from a different wound (which was not self-inflicted), and he's alone in the desert with no possible way to get medical care. So he's not having a moment of "do I want to die right now?", he's having a moment of "I am dying, no way around that, do I want to wait around through the slow painful death, or get it over with?"
(What interrupts him is a disembodied voice that offers magical healing powers. Which he had no way of knowing was an option before it started talking to him.)
Re: Content Warnings (contain MAJOR SPOILERS!)
At the time this happens, Marc is actively bleeding out from a different wound (which was not self-inflicted), and he's alone in the desert with no possible way to get medical care. So he's not having a moment of "do I want to die right now?", he's having a moment of "I am dying, no way around that, do I want to wait around through the slow painful death, or get it over with?"
(What interrupts him is a disembodied voice that offers magical healing powers. Which he had no way of knowing was an option before it started talking to him.)