https://en.m.wikipedia.org/wiki/Correlation_does_not_imply_causation#

Einstein never said that:
https://quoteinvestigator.com/2017/03/23/same/?amp=1

This is what remote work is for

From the article:

First, the findings represent an association, not causation. This means the study does not prove that coffee intake is the true reason for the weight change. Rather, it shows the two changes were observed together over time.

There open and women so it's not exactly separate