The mod team periodically evaluates the review stats of the community to see if there are outliers with respect to some statistics, and we act upon those if we perceive problems.
We understand that there is a wide spectrum of different opinions regarding what should be closed/reopened etc. However, when doing review, people are contributing to the site, so its standards (as a community) should also contribute. One should attempt to consider both their personal perspective and the community perspective to some extent. (This is intended for all people in review, not one side or another or yet another.)
This last paragraph may be a good rule of thumb to strive for, and is essentially what you should be "more careful and critical". But, more practically speaking, it suffices to have a balanced review process.