I think you’re not actually wrong here. All this would mean is that the fossil record cannot be used to support evolution, if there was some explanation (I cannot imagine what, but let’s say there is one) for how evolution could have occurred but all species appear at the same time in the fossil record.
I’m not sure that is correct. If there were no such things as fossils, we could still created a phylogenetic tree from the species that we know exist right now. This is one of the strongest pieces of evidence for common descent that, unfortunately, is not easy to understand so creationists cannot appreciate it.