Timid writers like passive verbs for the same reason that timid lovers like passive partners. The passive voice is safe. The timid fellow writes “The meeting will be held at seven o’clock” because that somehow says to him, ‘Put it this way and people will believe you really know.’
Purge this quisling thought! Don’t be a muggle! Throw back your shoulders, stick out your chin, and put that meeting in charge! Write ‘The meeting’s at seven.’ There, by God! Don’t you feel better?