I totally agree. I'm a native speaker and my Arabic name (ضياء) has no definite, accurate transcription in English for another reason.

Arabic language has many letters and sounds western languages don't have equivalents of and therefore foreigners are completely unable no pronounce.

Another point is that vowels have different characteristics in different languages; height of the tongue, backness, roundedness, nasalization, ..etc, make it almost impossible to write the correct equivalent for some Arabic vowels in English. For example, we have a word (هيل; means cardamom) whose vowel length is between hail and hell that I can't think of any accurate way to transcript in English.