This is your naked opinion only. There is nothing in context to suggest that.
"Church" is spelled "church".
Capitalization in Bibles generally differs form lay discourse. Pronouns referring to Christ are not capitalized either.
We don't learn tradition through men
Not what St. Paul said in 2Th 2:15, as you helpfully quoted. It is true, of course, that not all traditions of all men are helpful. This is why one should avoid traditions of Messrs. Luther and the rest.
Joh 20:30
Fine, the gospel is written "so that we may believe". It is not a claim of completeness, as Evangelist St. John himself stated in the next chapter. If there existed such a claim, sola scriptura would have been proven from scripture, but of course we both know that it cannot be proven.
But take a step back, Alex. What do we need to know or do that is NOT in Scripture? What?
Not only is there the 2Th 2:15 quote, but as was quoted in Greek earlier in this thread, there is Rom 10:14-15 which suggests to me that apostolicity is a whole big part of the hearing and preaching thing. I won't say it's conclusive one way or the other, but if we're going to talk about the
overall context and message and such, as well as about not torturing particular texts, it seems to me those verses and a mention of being, as the NEB has it, "commissioned" needs to be mentioned.