Can someone please explain to me how we have these Satoshi
quotes and yet there is still any discussion / debate / disagreement on it?
The quote says one thing, reality says another.
Reality = right now you can't get to a blocksize where you can do visa level tx capacity.
And this is similarly true, not only for bitcoin, but bitcoin-based clones and other blockchain-based systems.
The Real Reality says you can increase the block size as demand grows, and Bitcoin Cash is the real example of that.