Some doctrines are accepted blindly without thinking them through. One person believes that way, and therefore it must be true. No one really takes the trouble to study it out. Then when the doctrine is challenged on Scriptural grounds the appeal is made to man-made tradition--that is the belief of others, instead of Scripture. That is just what you did.I don't know why this concept is so difficult for some to accept. Some years ago I attended an American Baptist Association church. There was hardly a message given where the belief in a universal church was not attacked.
We have made many good solid Scriptural arguments, and the fact is that you seem unable to defeat them.
A universal church--an unassembled assembly is a contradiction in terms.
It doesn't make sense.
It is an entity that doesn't make sense.
It is impossible to function. It has no purpose. It cannot gather. It cannot carry out the Great Commission, the two ordinances of Baptism or the Lord's Supper or any other command of Christ.
It is an ethereal, nebulous, entity that contradicts the very word ekklesia, the word translated into "church."
Ekklesia means assembly. That is the only meaning it has. Why assign a meaning to a word that the word doesn't have. That is not rightly dividing the word of truth.