I’m no expert, but I thought old Hebrew did not have vowels in writing until Aaron ben Moses ben Asher, a Jewish scribe who lived in Tiberias in northern Israel and refined the Tiberian system of writing vowel sounds in Hebrew.
Originally, the Hebrew alphabet was an abjad consisting only of consonants, scribes later devised means of indicating vowel sounds by separate vowel points, known in Hebrew as niqqud.
I see I got here a little late. And your reply is more erudite than mine would have been. But, yeah, “dropping the vowels” from Hebrew is a bit problematical.
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Ancient Hebrew is completely pictographic, but nothing shown here is.