I think part of the intention of the Second Amendment is to have a well-armed population that has the capability to push back against a government that has overstepped. Five or ten rounds isn’t going to help much there.
Why is it a foundational human right? Who decides that? It seems to me that a lot of people disagree.
Human rights only exist because enough people believe in them. All of them, including free speech are up for debate and constantly need to be defended.