But our theology is not based solely on Scripture - it never has been.  The logic that leads to no Church begins with a denial of one of the very fundaments of Christianity - the death and resurrection of the Lord Jesus Christ for the remission of sin.  Paul's writings echo those of Psalm 51 and recognize a basic flaw that for which Jesus is remedy.  God did not create that flaw (why would He?).
No Original Sin, no need for Jesus the God-Man.  No need for Jesus, no need for the Church.  The Church defined Scripture so, minus the former there is no latter.
We put our faith not only in Scripture but in the Authority that defines it; the Church.  Prior to Scripture's codification, however, people put their faith in the preaching and teaching of the Apostles and their successors.
The "truth as we know it today" is not in conflict, that I can see, with the truth that the Church has always taught.  And I'm 50+ years a scientist.