A single study, which only studied 61 companies, in only one country, for only half of a year, which was conducted by a biased entity that makes their living by

A single study, which only studied 61 companies, in only one country, for only half of a year, which was conducted by a biased entity that makes their living by pushing four day work week ideas to companies. That is not "we've tested it". That is "we have one single extremely shaky, if not near worthless, data point".