This theory also uses the arrow hit to back it up, they say that Otzi was attempting to fight an attacker for the last few hours of his life. They saw the arrowhead and they also found out from X-Rays that he had broken ribs, which raised the question "Were those ribs broken while he was alive... or after death?" Maybe he fell shortly after his death, the answer is unknown, yet we are still looking into this theory. People are quite unsure because he was trapped for nearly 5,000 years! There could have been a lot of wounds that were caused for all of this resting in the ice.
Some suggest he died trying to defend himself in a fight, this seems quite possible because there's proof that he was wounded on his wrist AND he was attacked by a flint arrow, so maybe he began to run after getting his wrist injured and then he was attempted to be shot at by the flint arrow, maybe he wasn't well this obviously led to him dying of hunger or thirst, but the theory doesn't support this instead it supports that he WAS shot and he didn't flee or get away. What happened after he got shot with that arrow in the shoulder well he simply bled to death, this seems like an unlikely part of this theory I mean he bleeds to death instead of being shot at again? Also, there was an arrow wound found which scientist also used to figure out he had the oldest blood cells but that's off topic. So he rapidly bled to death.