Ice makes the whisky lose its taste, so that whole line is nonsensical to me. He thinks people who don't like the taste of whisky are heroes without capes?
I dunno, while ice definitely takes a lot out of a whisky it leaves something there and is still IMO a totally acceptable way to drink it (particularly if it's a hot day or if it's cask strength). But I agree it's an odd selection for the "hero" drink :)