Question of the Day: Why Were Guns Enshrined in the Bill of Rights?

Self defense is a human right. And now marriage is a human right. Why is marriage not mentioned in the constitution? If we argue that it was understood (and didn’t need to be affirmed in a legal document) that people want to and have a right to get married, why was the right to guns enshrined in the Bill of Rights? After all, it was understood that people needed to put meat on the table and defend themselves from attackers. If procurement of food and marrying are rights that “go without saying”, could it be argued, then, that the only reason we have the 2A is not for the purpose of hunting or personal protection, but as a defense against tyranny from an abusive centralized government?