Full disclosure - I work for Eagle Eye Networks, and we sell PoE Switches
We have recently released the ability to control our PoE Switches from within our UI. It allows authorized users to reset the power on a camera by camera basis, without knowing which switch/port the cameras are plugged into. (for example reset the power on the front door camera.)
As we were researching/designing this feature, I had mixed feedback from Dealers. Some absolutely loved the option, which I expected. However, there were a large number of people that said something like "I would never use that, I don't need to restart cameras." I couldn't get to the bottom of why they wouldn't even want the option. The best I came up with is that they just don't monitor the systems regularly.
My personal belief is that there are quite a few cameras out in the world that are not working, and people just don't know about it or don't care enough to power cycle them.