Yes, but that does not negate the fact that it is that very Church that gave you the Scripture you profess to follow.
Odd that that is the common belief of the Roman Catholic and it IS said frequently enough and believed among most of you, yet you have also quoted from one of your Popes (Leo XIII) that God is recognized as the author of Scripture:
"And the Church holds them as sacred and canonical, not because, having been composed by human industry, they were afterwards approved by her authority; nor only because they contain revelation without error; but because, having been written under the inspiration of the Holy Ghost, they have God for their author." Leo XIII on the inerrancy of scripture (from Providentissimus Deus) [ecum.]
I think it would be more fitting to also acknowledge that since we believe God himself is the author of Scripture and that it is inerrant, then we should, too, accept that God is the one who has preserved it so that even today, thousands of years later, it is just as relevant, true, sacred, inerrant and our sole source for doctrine, for reproof, for correction, for instruction in righteousness, that the man of God may be perfect, thoroughly equipped for all good works. Why try to steal God's glory?