I think for me broadly, the answer lies in the fact that the laws of nature are necessary, whereas software is contingent. For example, perhaps a bug happens be

I think for me broadly, the answer lies in the fact that the laws of nature are necessary, whereas software is contingent. For example, perhaps a bug happens because of running out of memory, thus the software running properly is contingent on the memory. But on the other hand, gravity, for example, is necessary, in that it is not contingent on anything to make it work. It just works. So for me I think the reason software has bugs, but nature doesn't, is that the former is a contingent phenomena, the latter a necessary one.