@dtim to be fair. If we are talking a complete immersion/insertion type of game, the rules would naturally change. Party systems etc are made for comfortably communication, as you could just use another program in most cases, if it wasnt present.
If you are completely immersed however I could see an argument to disallow external communication, so that the stakes are higher. No calling for help from strong boy senpai if you are stuck. take your hits like a man get stronger and return later.