Yes, your argument is based on the idea that fingerprints can't be leaked in practice, which is false.
It's worked for years against a variety of scanners, and is likely always going to be viable because of how scanners work -- a thin overlay can be made of things that are indistinguishable from a finger surface to the scanner, but which triggers the critical points.
If you think that's changed in the past few years (which you seem to), I would appreciate something a little more substantive than your random comment on HN.
