Arguing in the other direction isn't as persuasive, because Turkish and English aren't the only two languages in existence. French, Dutch, Spanish, Italian, Ger

Arguing in the other direction isn't as persuasive, because Turkish and English aren't the only two languages in existence. French, Dutch, Spanish, Italian, German, and many others use the same letter i and have more vowel sounds than vowel characters. That's nobody's fault in particular, though. Unlike Turkish, these languages did not have their writing systems dictated from on high.