Go ahead and read the books that are full of contradiction.
Investigate how it was determined which books are part of the bible for example. It's rather arbitrary.
They've corrected the translations of the bible specifically, almost hundreds of times, just to discover that it changes the meaning of ideas that are at the pillars of the religion.
For example, the "virgin" Mary translation, actually just means a young woman.
Not to mention that there's almost no physical evidence of many of the events described there.
On the other hand, the evolution theory has ample of physical evidence, and it's widely agreed on by a lot of scientists, subject matter experts, not a group of people looking for a way to control the masses.
Also, you obviously don't understand what a scientific theory is.
It's thousands and thousands of scientists and papers that corroborate the same idea, and come to the same conclusion.
Verbatim from wikipedia for example:
The definition of a scientific theory (often contracted to "theory" for the sake of brevity) as used in the disciplines of science is significantly different from the common vernacular usage of the word "theory.
Nowadays, widely accepted scientific theories such as evolution theory, relativity theory, newton's gravitational laws are just that...scientific theories.