Something to think about

Here's a little of the stuff that has been running around in my brain for a bit and I was wondering if you guys might have some ideas about it.
Any who...here goes...
Why do we in western civilization think that the impersonal (i.e laws of physics etc) are a more direct route towards an explanation for events rather than a personal cause? For example if I were to tell some one that the reason something falls doesn't have to be because of gravity, it could be because it wants to or something else wants it to. But when these other plausible explanations are offered then Occam's Razor is invoked to discount them because they are more complex then simple impersonal forces. Why are they simpler? What makes them preferable? Jus a question to get responses to.

Adieu.