Yes, or at least probably. There’s a lot of stuff in your neck you just can’t do without, so injuries there are always a serious threat.
But, as we’ve mentioned before, actually stabbing with an arrow is a lot harder than it looks. The shaft is designed to be aerodynamic, not to give you a solid grip, normally this isn’t an issue, but when you’re trying to use it as an improvised melee weapon, it becomes relevant.
It’s not impossible, but unless it’s a last resort, I couldn’t recommend it.