This isn't very kind, in fact it's an outright personal attack. Worse, it misses the point, it's about making a quick back-of-the-napkin calculation as business

This isn't very kind, in fact it's an outright personal attack. Worse, it misses the point, it's about making a quick back-of-the-napkin calculation as business consultant while making OKRs. The problem with adding segmentation for more accurate calculations is there's always one more person who can sneer it's inaccurate because there wasn't enough segments. This type of person tends to move on from marketing / data science quickly, real world constraints are very frustrating to them