By a lot of people, the bible is considered not important, just a fantasy.
False dichotomy. The people who think that the Bible is a fantasy also consider the Bible to be very important ---
to Christians. 'Cos it is.
So why was it so important to be translated, copied, and is found in every book store, library, etc? If it's not important, why go through all the trouble to have it in every country?
The reason that there are a lot of Bibles is, obviously, because there are a lot of Christians.