It's not that so much that science always hide truth.
It's because science can only go back so far. Then what ?
Nothing. Literally nothing. There was no 'then'.
Let's take the big bang theory for example of scientist.
So what happened for this big bang to happen.
Scientists will say two planets or meteorites collided.
Ok so where did these planets and meteorites come from.
No competent scientists has said this. It certainly isn't the standard scientific description of the Big Bang.