You don't understand how the reasoning process works.
The more outlandish a proposition, the more proof has to be brought to bear on it. Basically, Occam's Razor.
When I see an odd hole in a rock on a planet not shown as yet to have ever possessed even cellular life forms, one does not first assume that animals did it, even if one does not have immediately available a geological explanation.
This is ESPECIALLY true if one is not a professional geologist. There are many professional geologists which are examining the same pictures you are, some getting paid to do just that, and any one of them would probably give their right arm to be the first to spot a real fossil. You can bet if they eliminated every other possibility, you'd hear about it.
Don't push it.