Then I think you're misunderstanding how science works. There is no assumption of conclusions. Good scientific endeavors remove bias and presuppositions by using "double blind" testing methods.
On the other hand, what your christian theism accounts for it does so by just making things up. Your religion is based on the writings of bronze age goat herders, it **must** therefore be assumed to be flawed. There's no way those people back then knew more about the world/universe than we do now.
Yes, you can account for more things. But your knowledgebase is much more likely to be flawed, incorrect, and filled with falsehoods. I for one, would rather just say "I don't know" about something than to try and force in an explanation for which there is no evidence.