Yes. All communication is miscommunication. "[Y]ou just fix it as best you can" includes you getting help to fix it. Getting help is one of your abilities. So,

Yes. All communication is miscommunication. "[Y]ou just fix it as best you can" includes you getting help to fix it. Getting help is one of your abilities. So, for example, it's up to you to oppose discrimination via the legal system - it's your fault you're letting them get away with it. It's up to you to organize a union to counter exploitative practices - it's your fault you haven't done that yet. It's up to somebody to do something - it's up to you. If you're neglected what you can do, it's your fault. Munger isn't saying it's literally true, but that it is an effective way to face life (this "attitude... works" in the quote).