The 2A as stated in so many words is all inclusive.
Oppression from government is but just one of very many reasons for a person to bear arms.
Feeding ones family via tools which also include borne Arms is yet another. And BTW 'Arms' by definition is not just firearms either. This includes pneumatic rifles (recall Lewis & Clark used one during their travels to hunt for food), bow & arrows, swords, knives, axes, clubs...etc ad infinitum.
There are many multiples of use of Arms and to that the 'Militia' to make use of Arms, as they are specifically referred to in the 2A, toward "being necessary to the security of a free State". Security by definition is broad as well and not just toward oppressive government, even in those times and revolutionary war days. The founders in drafting the Constitution _and_ the Bill of Rights were not looking at just the day they were in singularly. They were thinking forward and
broadly toward a life for themselves and their brothers and their families living in a society amongst a world that to that time was unimaginable and unheard of. There was no such thing at that time or prior to what they had proposed vis a vis the Constitution. They were thinking broad scale big picture all inclusive freedom. And that freedom included and still does include but is not primarily toward or as was proposed wrongly exclusive to overthrow of government if it be deemed oppressive by the people.
If that were in fact the case then as the 2A would read differently and state in so many words; '...being necessary to the security from oppressive government'. But as it does not the framers smartly and wisely addressed this specific condition in a broad and all inclusive state as opposed to pigeon holing defense and ability to bear Arms toward primarily or worst even singularly against oppression by government.