Not obvious? Not directly mentioned? Where is it is even indirectly mentioned? So hidden really means not actually mentioned in the bible at all? Now there is nothing wrong with taking what we read in the bible and trying to come to our own limited understanding of the eternal God and how he works in the world. It is a problem if you condemn others on the basis of your own personal opinions. Careful? Hardly. Matt 12:7 If you had known what these words mean, I desire mercy, not sacrifice, you would not have condemned the innocent.
And how does evolution being strongly supported by science make it sinful too? Are atoms sinful because they are strongly supported by science? Is heliocentrism sinful, did the church fall into deep sin when it accepted heliocentrism because it was strongly supported by science? Is evolution even more sinful because it is even better supported than heliocentrism? This makes not sense. Somehow the evidence that evolution is true has been twisted in the minds of creationists into evidence that it is wrong? What can free a creationist from such twisted doublethink?
You didn't answer me about human reproduction. The bible says God formed me in my mother's womb, that he has created me. Does reproductive biology discredit God's work? Does human reproductive biology make more sense if God is taken away from the process? Jesus tells us that God sends rain on the just and the unjust. Does meteorology discredit God's work? Does meteorology make more sense if God is taken away from the process? We thank God for our daily bread, does believing in farmers and bakers discredit God? What creationist have forgotten is that God works all things according to the counsel of his will Eph 1:11, upholding all things by the word of his power Heb 1:3. Evolution is no different from reproductive biology, meteorology plate, gravity, tectonics or atomic physic. Creationist have lost a very basic appreciation of the power of God and how he works through everything in the universe. Your condemnation of your fellow believers is not just based on your theology rather than on what the bible says, it is based on bad theology.
Sure, if it is a mistake. But if God did from the human race from ape ancestors it is just as good as moulding us from a lump of clay.
And any child can see that the earth is flat and that the sun goes round the earth. So what? Christians in the past thought science was contradicting the literal meaning of scripture when it denied a flat earth and heliocentrism. You even had believers ignoring all the evidence and saying you still can't prove the world is round, and such wilful blindness is still bringing the gospel into disrepute.
Oddly enough it was Solomon who actually kept apes (1Kings 10:22) who came to the realisation that we are animals too.
Eccles 3:18 I said in my heart with regard to the children of man that God is testing them that they may see that they themselves are but beasts.
In fact according to Solomon God wants us all to realise we are animals.