Bruh, you're taking a metaphor at face value instead of just understanding that it is, yes, a simple slogan meant to represent a much larger idea. A very common anarchist slogan, in fact. It wasn't meant to be a point. It isn't an argument against any of what you stated because it isn't itself an argument. It is just a slogan that represents a more in-depth point. No, the proletariat cannot just use systems of oppression and hope it withers against its fundamental design. That's just naive, wishful thinking that doesn't understand how the system works to reinforce itself. Tools also depend on their design to function in a specific way. You can try to saw away at a tree with a hammer all day but you'll never cut it down. So the answer isn't to use their tools to do something they weren't designed to do but to build/use different tools altogether.