>Instead of trying to understand why 80% of the people are leaving, try to find out why 20% are staying.
That's a survivorship bias. You have to analyze both groups in order to improve the ratio.
That's a survivorship bias. You have to analyze both groups in order to improve the ratio.
In that context, it's really not a survivorship bias. If you want to know about the survivors, it's not wrong to consider the surviors only.
Now you are trying to treat that solution that is explicitly meant to answer the new question as if it were an answer for the original question, going so far as to apply logic issues from the old onto the new.
Discussions, particularly ones of this nature, change and shift direction. It doesn't mean that later topics inherit logical traits or something from earlier ones.