I know that the answer is yes, I should, but outlets near the setup are not grounded (even though they look like they are) and I don’t want to have wires running though my living room.
The real question is what are potential problems ? Occasional system reboots? Permanent damage to PSU? Permanent damage to other components?
Second note, the metal pipe has to be continuously metal from at minimum where it enters the house, don’t trust that if you see a metal water pipe (or drain pipe) that it’s grounded.