Guess I'm not at all sure what you're saying

The corner is playing off Watkins ... true.

But he also has inside position. And ... he jumps the inside route.

I'm just working from memory ... but Goff threw the ball to the out route, correct? It went out of bounds.

As you say ... had Goff thrown the in-route ... it may well have been picked.

So, not sure how that is a mistake by Goff.