This plug does not need to be removed to clean the oil galleys. It's only reason for being there is because of machine methods. Every passage can be reached without removing this plug.
Not true. You may think That the oil galleys are clean, but if the motor was especially gunked up with sludge, residual sludge can be left up against the plug and then come loose after the new motor is fired up. For a 50 cent plug and 2 minutes of labor, I'm not going to take that chance.