Feynman's quote is distinguishing knowledge of the thing itself (e.g. its behaviour, properties) which he thinks is useful, from ontological knowledge (naming and categorising) which he cares less about. As a physicist he only had to remember 61 particle names and 4 force names :)

That's not to downplay giving things names! Obviously it's essential to get any collaborative work done that everyone uses the same name when they mean the same thing.

On applying my logic back to the introduction of the binomial naming system... very clever! But I think it was Linnaeus's peers liked the properties of binomial naming so much it had a unifying effect on them... and now they have unity, and there are many more scientists worldwide depending on this system to communicate, they don't need a challenger system to provide a different form of unity?