U missed the main point. Majority of Koreans (50% weightage) vote for K trainees.On the other hand, international votes are more evenly distributed among C J K.
Overall Popularity does not matter. If K+international votes are summed up, then it will be fair to determine the overall most popular contestants.
But with K votes being given 50% weightage and they only want to pick K members, this is the problem
I just wanted to point out that the K-contestants would rank higher either way. It's not just the voting system.
Ofc international fans wouldn't like the 50:50 split but Korea is their home market and it is a Korean show. At least it's better than Produce where only Koreans were allowed to vote. We don't know what the final groups' promotion will look like yet but compare it to P48 which confirmed from the beginning was gonna create a k-pop/j-pop hybrid and still only let Koreans vote.