I do check my texts for passive voice and turn a lot into active voice. However, sometimes I do prefer passive.

An example from the abstract of my (unpublished) dissertation: Exploiting special hardware is a well-known technique to lower energy consumption, which is another important aspect that must be balanced with raw performance.

I don't want to use active voice, because at this point nobody cares who does the balancing. Using you (...that you must balance...) seems not suitable in an abstract.