Why not? No man, the burden is on you. Why would Ayn be pronounced Anne? Why insert a spicy vowel into the middle of a word and pretend like it doesn't change the pronunciation at all? Ayn Rand, the person who invented the name, pronounced it Ein. Phonetics exist. In some cases, there is the argument of linguistic provenance. There's no argument for that here. That's just a random mishandling of basic phonetics. Surely I don't have to explain the concept of phonetics? I'm not going to, but that's my answer to "why not."
