Lots of speculation here. He was shot with an arrow and died in the snow. He was sterile. That's really all they can deduce with any degree of certainty.
That he was driven out or killed because he was sterile is sheer speculation.
The four different blood types and samples found on him along with the arrowhead in his back suggests he had a rough last few minutes. Some one or some number wanted him dead.
My theory is that because of his widely known sterility, he was a renowned sportf-——r of the Alps.
He was chased into the Alpine pass by an irate husband and his kin who’d found him in his wife’s boudoir.
He woulda made it, despite the wounds, except for the sudden blizzard.
This is a valid archeological theory based on evidence.