I was with you until the last sentence. The Church and its leaders already existed in 140 AD. Pope Clement for instance was the bishop of Rome in the late 1st Century.
You did not understand because you most likely did not understand the idea that I was attacking.
There are some of the RCC persuasion who look to the church as an intercessor between man and God because through the Mass, and in particular through the Eucharist, the RCC gives salvation to its adherents One part of that false paradigm is the concept that "the RC Church gave us canon" (I am not a RCC, but I am stating what they believe)
To emphasize that fact, I used the heretic Marcion as an example of people who attempted to define the canon of the New Testament.
FYI there are posters who deny who deny both the Hypostatic Union and the Trinity. The user name of one of them is a dead give away as to his theology. Therefore, in this part of CARM, one has to be very careful with regard to how those sorts of cultists post and spread their heresies.