"making stuff with it" is not the entirety of the scientific method. I suspect you know this. What you are arguing here is nonsense. Science isn't perfect and doesn't claim to be, so pointing out some corner case and saying "here, this bit is wrong" can't be used to dismiss the entire scientific method.

If you want to argue in that fashion, I'd like to point out to you that praying doesn't always work, so all religions must therefore be bunk.