*Except the Law does not say that.
In this instance "the Law" is a reference to the Torah, and in particular to Genesis 3:16, and most commentators are agreed that this is where Paul derives his authority BY DIVINE INSPIRATION.
Unto the woman he said, I will greatly multiply thy sorrow and thy conception; in sorrow thou shalt bring forth children; and thy desire shall be to thy husband, and he shall rule over thee.
It may also be possible that there are other OT passages which support this teaching, but regardless of what is referenced, if it is in NT Scripture it is true for all churches.
John Gill also goes on to say:
"The extraordinary instances of Deborah, Huldah, and Anna, must not be drawn into a rule or example in such cases."
But that is exactly what you are doing. You are giving examples of prophetesses, and failing to give more weight to what is stipulated in Scripture regarding the operation of Christian churches. Paul was fully aware of these few prophetesses, but it is God who instructed Paul to write what he wrote, but you are boldly denying that what he wrote is true. Then how do you know what is true and what is false in the Scriptures you quote all the time?