The main point is it's a entire system hidden within the server. Server admins know these are onboard and can be lifesavers to reboot and reimage a server via remote when onsite ppl are less than technical.
I have had a on site server user turn the the monitor on and off 10 times and swear the server was rebooted. These people are stupid
on the other hand the IPMI remote access could be used to monitor wrong doers in real time.