Maybe you can say that someone who has the Holy Ghost is not your brother, but you are not being scriptural. The Spirit in them is the same Spirit of adoption that's in YOU, crying "Abba Father". You can't have it both ways. Furthermore, I've done many studies on oral invocations. I believe in them. But there is just not enough data to say that it is the "blood" is somehow "in the name" orally invoked. Again, that is eerily similar to transubstantiation.
Here is my question you did not answer.....
So does the blood still literally exist today? Where is it? Does it have a storage place? Is it orbiting the planet waiting to dive bomb sinners who are getting baptized? Is it invisible? Do you literally believe that blood has come in contact with your soul?