Again bullshit. Rubber is actually
Boy stop your bullshit. Rubber combined with haki and heat further increases luffys durability. It's called vulcanization. As stated by Rayleigh.
Vulcanization is a chemical process in which the rubber is heated with sulphur, accelerator and activator at 140–160°C. The process involves the formation of cross-links between long rubber molecules so as to achieve improved elasticity, resilience, tensile strength, viscosity, hardness and weather resistance.
Yet you want to bullshit and state other wise.
Again swords grant Zoro the ability to cut. He can replicate similar moves with no swords since he has an actual fighting style designated for not blade use. And the only difference was that his force was blunt instead of sharp. There is zero evidence that suggest his strength increases because of swords. Infact the SBS is against your notion. Why? Because Zoro actually trains his swordsman ship so that he can release all of his natural physical strength throw his blades with out them breaking etc etc.