It also leads to passive voice, which is sometimes appropriate ("Then three cubic centimeters of goat bile were added to the solution"; ideally, anyone should b

It also leads to passive voice, which is sometimes appropriate ("Then three cubic centimeters of goat bile were added to the solution"; ideally, anyone should be able to perform this experiment, and the experimenter is out of the picture entirely), but in general, I agree with you. The mental trick is to append "I think" to the beginning of every sentence and hope that that works. Also: using the "I" opens up the argumentum ad hominem, which can focus criticism into uncomfortable territory ("Goat bile shouldn't have been added until after the solution was brought to a boil!", versus "You shouldn't have added goat bile until...." One of those is a bit more likely to be taken personally (albeit by someone with thin skin, perhaps as a result of too much exposure to goat bile)).