As one minister put it if we test it against what God has already said in scripture and it agrees with it - what does it add to scripture?
That begs the question, since no continuationist believes we are adding to Scripture. And the question itself is faulty. In one of the threads on this topic, that was brought up and Prof Duguid, himself no continuationist, pointed out the problems with it.
I think it’s correct to say that everything God wanted said in the Hebrews 1:1 sense, he said through his Son and disseminated it through his Son’s apostles. We have no real evidence that the book of Hebrews was written by an apostle.