That said, if someone tells me that the mast tip weight requirement makes building out of carbon fibre pointless, maybe Mr. Melvin's comment is defensible?
No, that would be wrong as well.
It would however make the carbon mast durable. Didn't Matt fly a carbon mast in that video of his crash on a sandbar ? Same situation as with "the trials" but different end result ?
Besides carbon mast bend can be tailored to a wide range of desires and that to may be a benefit making things worthwhile. Well, maybe not so much for amateur sailors but certainly for Olympic level crews.