"This is why Hebrew's alphabet near-perfectly phonetically represents the spoken language" - nonsense. That's just because modern Hebrew is based on the written language and thus reflects spelling pronunciation rather than historical pronunciation.
Also, proto-Sinaitic is not an alphabet. That's why Persian writing became harder to read when they switched from the nearly alphabetic Old Persian cuneiform to Aramaic abjad descended from proto-Sinaitic.
No, modern Hebrew and ancient Hebrew mapped similarly well to the written script — the primary difference between the two is just consonant drift. Both used the same structure of triconsonant roots with affixed patterns, and modern Hebrew morphology is identical to ancient Hebrew (phonemes changed primarily due to consonant drift, but not its structure). Arabic, for example, is similar and similarly well-mapped to its script, as are other Semitic languages that are closely related to ancient Canaanite.
> nonsense
Can you please make your substantive points without directing pejoratives at the other? This is covered in the site guidelines (https://news.ycombinator.com/newsguidelines.html):
"When disagreeing, please reply to the argument instead of calling names. 'That is idiotic; 1 + 1 is 2, not 3' can be shortened to '1 + 1 is 2, not 3."
Your comment would be just fine (indeed, excellent) without that bit.