Science knows it doesn't know everything; otherwise, it'd stop. But just because science doesn't know everything doesn't mean you can fill in the gaps with whatever fairy tale most appeals to you.

If we were truly created by God, then why do we still occasionally bite the insides of our own mouths?

I'm sorry, 'herbal medicine', "Oh, herbal medicine's been around for thousands of years!" Indeed it has, and then we tested it all, and the stuff that worked became 'medicine'. And the rest of it is just a nice bowl of soup and some potpourri, so knock yourselves out.