The article conflates "science" and "scientists". Science can test hypotheses, even if individual scientists fall in love with their own theories.

The article itself gives a concrete example-- the work showing Sapir-Whorf hypothesis is a "fluke" was done by a different research team.

A more interesting question than "Do scientists suffer from confirmation bias?" might be "Are scientists more prone to confirmation bias than other professionals?" Or "In the long run of history, do the conclusions of science get overturned more often than the conclusions of other fields?"