I'd buy one.
My reasoning:
This is not an every day tool. Its designed and intended to be carried 24/7 in a manner that protects the firesteel but is extremly durable. One of the major problems that I have with firesteels - and I speak as someone who carries one for 16 hours a day - is protecting it. The best solution that I have come up with so far is to coat it with nail varnish. Which works, but I have to recoat on a regular basis.
I also EDC a (Swedish) firesteel on my keyring. My steel is worn from its actual intended use. Unless I am really missing something here, why the need to protect the steel and from what?
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Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books.
John Lubbock