Arial Black
Adventurer
No, he tweeted how he interpreted it. He's also tweeted a lot of other stuff, which never made it into eratta because it was a snap decision response which he called wrong.
In many tweets he has said that the reason that this thing is or is not an attack is because of 'attack roll' (or lack of same), the word 'hit' implying an attack roll, etc.
He is understanding the 5E rules with this in mind, not just in one corner case but consistently teaching us that this is how we can work it out for ourselves.
And yeah, he wrote the rules.