You are saying that the creation is in no way profitable to salvation, that's not what Pope Leo said.
SAINT Pius the X spoke, as I mentioned about things which touch on the foundations of our religion and then mentioned creation first before anything else.
Even if Pope Leo was referring to the flat earth and it was confirmed by some of his successors, that does not make it right! All the post conciliar popes have confirmed VII's teachings. Clearly they are ALL wrong.
To repeat myself, sacred scripture is not a science book. I am however entitled to take it literally, especially when it is backed up by science.
The fact that God created everything including humanity is indeed a truth at the foundation of our religion. That is why, for example, we know that evolutionists who say that everything just came about through random events are wrong. Of course, Pius X mentioned the fact God's creation it first. It is the main point of the first chapter of Genesis. It is also the first line of the Creed.
But that same docuмent said: "
it was not the intention of the sacred author, when writing the first chapter of Genesis, to teach us in a scientific manner the innermost nature of visible things and the complete order of creation but rather to hand on to his people a popular account, such as the common parlance of that age allowed, adapted to the senses and to man’s capacity" so it is not necessary to treat it as if it were scientific information".The fact that creation happened and God is our Creator does not mean it is profitable to salvation to look at the the creation account (or an other part of Scripture) for details about science. That is not the intent and it is not necessary.
You are not entitled to take literally things that the Church teaches are not literal any more than you are entitled to take figuratively that which the Church teaches is not figurative. You are not entitled to treat as science that which the Church teaches is not meant as science. The Church has the sole authority to interpret Scripture.
And if your insistence on flat earth makes you reluctant to accept that authority, ready to claim that multiple popes taught in error, then something is seriously evil about this belief. Our concerns about the post-Conciliar popes are based on their apparent contradiction of clear Church teaching, not due to them interfering with our pet theories about science. There was a never such a teaching about flat earth. For at least the last thousand years, virtually all Catholics believed the earth is a globe, although it was never taught as doctrine.