Quick questions: javelins with dueling style and natural weapon proficiency

[ThorOdinson]

But they do indicate the RAI.

You can claim they’re not RAW and be accurate.
But you can’t claim that the developers saying something doesn’t indicate RAI.

Moreover, you’ve yet to prove that your reading is the only possible correct one. It is a technically correct reading, but not the ONLY one.

You can use the JC Tweet if that meets your standard. The tweets however do not meet the official standard

JC Tweets have been officially declared as unofficial house rules. The official FAQ is the contents of the current Sage Advice Compendium. The JC Tweet is not in the current Sage Advice Compendium.