You must admit that even an imperfect setup that leaks a little bit of metadata is a lot less bad than storing your entire inbox in cleartext at the NSA, which is what regular email amounts to.
But he never argued against that, he is saying that bitmessage (aims to) provides a solution to a particular problem, and your proposal would absolutely dismantle that solution.
Whether the result would be better that another unrelated product is irrelevant.
"here is a sugar-free pie !"
"you should add sugar to solve the sour taste problem"
"but, that would defeat the whole no-sugar thing ..."
"You must admit that it's still a lot less bad than soyent though !"
