I'm using theoretical arguments to try establish what your line of reasoning is, because it makes no sense to me. First off, you have to either discount them all or allow them all.
Simply put - some miracles are easier to attribute to chance than others. This has to do with what people believe is possible first of all. Some miracles are very difficult to attribute to what we call chance in the way the word is used.
The bible reduces the factor down to nothing. Take the healing of the blind man. Was it chance that when Jesus touched his eyes, he was healed?
But when Moses touched the rock and water came out, people say that he probably already knew there was water in there, and that it was a natural spring. This is well and good, but it was God that brought him there, and God that showed him what to do.
These aren't hyped up arguments. The bible has been substantially backed up by carefully scribed books kept safe for centuries, and affirmed by dead sea scrolls, to a high degree.