Oh, wow. I can’t imagine having knife skills that precise. I’ve looked into this; what you actually need to do to prepare the fish isn’t actually difficult- there are only two organs that need to be removed without puncturing them.
But you still need a steady hand and incredible precision to remove those parts 100% consistently, frankly slicing the fish into ‘paper thin’ sheets would be 10x more difficult- just, if you fuck up a paper thin cut then it’s still fine and edible. Managing to pull off that sort of presentation technique is a really good indicator that this girl is the real deal- if she can make those paper thin slices, she can remove the poisons in her sleep.
I would love to try real sushi one day, but alas. I live in the UK. Best I can do is homemade with stuff from the supermarket.