This idea was put forth many centuries ago- it has a name- Occam's Razor. Wikipedia has a good explanation. Not many religiously inclined people would like to adhere to Occam's Razor techniques because followed to their conclusion it all but rules out the existence of a G-d who is actively involved in the affairs of mankind. It all comes down to faith in the belief system you have to explain the universe and it's creation , the purpose of man and belief in an afterlife.
peace,
Moshe