K2 doesn't kill 25% of people who climb it.

It has a historic fatality ratio of 1 death for every 4 summits. If you have 100 people try to climb it in a season, 4 summits and 1 death you have 25% summit to death ratio, but 99 out of the 100 people survived.

Last year it looks like it had 175 climbers, ~50 summits, and 2 deaths. 2023 had over 100 summits and 1 death.