This is very poor reasoning. The scriptures were read in church since the beginning. The various churches copied each others letters and passed them around. That was one of the qualifications for inclusion in the Bible canon. Any book added to the canon had to have a history of being read in the churches.
Besides, Sola Scriptura does not mean that illiterate people can't know God.
Each Church had some writing but not all of them until such time as the writings were evaluated and compiled into one source. Between the years 390 and 406 St. Jerome translated the Old Testament directly from the Hebrew, and this completed work is known today as the "Old Latin Vulgate". The work had been requested by Pope Damasus. The Council of Carthage (397) was the first Council to publish a list of all the inspired books of the Bible. The Council of Florence repeated the canon of the Bible, and it was restated at the Council of Trent.
Besides, Sola Scriptura does not mean that illiterate people can't know God.
Of course not! The Bible denies that it is sufficient as the complete rule of faith. Paul says that much Christian teaching is to be found in the tradition which is handed down by word of mouth (2 Tim. 2:2). He instructs us to "stand firm and hold to the traditions which you were taught by us, either by word of mouth or by letter" (2 Thess. 2:15).
This oral teaching was accepted by Christians, just as they accepted the written teaching that came to them later. Jesus told his disciples: "He who hears you hears me, and he who rejects you rejects me" (Luke 10:16). The Church, in the persons of the apostles, was given the authority to teach by Christ; the Church would be his representative. He commissioned them, saying, "Go therefore and make disciples of all nations" (Matt. 28:19).
And how was this to be done? By preaching, by oral instruction: "So faith comes from what is heard, and what is heard comes by the preaching of Christ" (Rom. 10:17).